text:
# MathJax and RTF export

#### Will

31 May, 2018 09:37 AM

Apologies if this has been reported before. Not sure if it's a bug or a known limitation of RTF export.
Exporting any file with TeX equations rendered by MathJax into RTF does not work properly. Hopefully the attached screenshot makes this clear.

1. Support Staff Posted by Brett on 31 May, 2018 11:37 AM

MathJax export is one that I don't think will ever work for me in the
RTF export as it stands now. It's something I might be able to figure
out once I get the rewritten RTF handling finished, but for right now
there are a significant number of impediments to making that work.
Apologies.

-Brett

2. Posted by Will on 31 May, 2018 06:01 PM

Thanks for letting me know, and of course, no problem!

I the duplication of math formulae when pasting as RTF is actually a MathJax issue (not a Marked issue), see here.

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# Lambert W Function values

Do we know of any exact values of the lambert W function like we do for, say, the gamma function at $\frac 12$ ?

$$W(e)=1 , W(0)=0 , w(-\frac{\pi}{2})=\pm i\frac{\pi}{2}$$
The last identity comes from the mulitvaluated character of $W$.

format: plain


text:
## Monday, April 05, 2021

### Susskind's de Sitter rant

LHC: Phys-Org about a 2.8-sigma CMS excess in the search for stealthy SUSY.
First, Michio Kaku is releasing his new popular book, God Equation, tomorrow. It could be a similar book about the theory of everything as some books that were published years ago but I guess that God may place a more central role here.

You may also read an interview in the Grauniad where he mentions string theory, colliders, and his view that it may be a stupid idea to obsessively contact the aliens. I can confirm the worries. Alza.cz, a Czech competitor of Amazon, allowed extraterrestrials to be hired. What happened? They have completely dominated the commercials from that moment on. Each ad has a stupid green extraterrestrial with a dwarf's voice. ;-)

But back to the main topic. David B. sent me this 6-year-old, 89-minute-long lecture titled "Old Man Leonard Susskind's Rant About de Sitter Space" which was introduced by Edward Witten.

The Covid-19 format sucks but many of you won't care, I guess. At the beginning, Susskind says that he more or less believes that the known wisdom about quantum gravity "softly predicts" (and incorrectly so) that we live in an anti de Sitter space or similar space (where the time is asymptotically bound to something); and the dynamics is supersymmetry, either with an unbroken supersymmetry or with an extremely weakly broken one.

Sorry, I don't agree it is the right summary of the knowledge. Anti de Sitter space and unbroken supersymmetry vacua play an important role in string theory and high-brow quantum gravity in general but that doesn't mean that they are predicted by the theory. Instead, the right interpretation is that these assumptions (AdS, SUSY) make the life of physicists who want to calculate something easier. But Nature doesn't give a damn whether something is easy to calculate.

In fact, I think it is right to say that relatively to an effective field theory in the swampland, our better sketch for quantum gravity – either explicit string/M-constructions or some more general wisdom respecting the paradigms and/or swampland criteria – only differs (1) at nearly Planckian distances, (2) by the rules that determine how larger massive objects are being built from the fundamental degrees of freedom and/or start to violate the regional independence or locality.

String/M-theory or quantum gravity do teach us new things about long distances, "infrared" non-locality around black holes, UV/IR-connections, and similar stuff but all these insights are really derived and from the possible dual descriptions, one may always find (at least) one that looks qualitatively just like the effective field theory. If you adopt this perspective of mine, the fundamental framework of quantum gravity doesn't – and cannot – predict something about the highly infrared distances, asymptotic regions of the spacetime, and maybe not even about the bubbling of the Universes from each other in the eternal inflation etc.

A heavily broken SUSY surely makes it hard to calculate something but you can't really prove (at least at this moment, as far as I know) that string/M-theory or quantum gravity ban a breaking of SUSY at energy scales that are much higher than the LHC scale. After all, there are still 15 orders of magnitude between that collider scale and the normal 4D Planck scale. The broken SUSY and/or the positive cosmological constant are still emergent, long-distant effects, even in string/M-theory or quantum gravity, and it is appropriate that it is difficult to calculate whether they occur. On the other hand, the apparent tiny cosmological constant is still a legitimate positive argument in favor of SUSY because SUSY makes the cancellations of the vacuum energy more likely or more plausible. The existing methods don't seem sufficient to get the tiny observed value but the qualitative statement is right, anyway. You make things worse by abolishing SUSY altogether.

Also, the degrees of freedom – what to calculate – are surely harder to be defined and calculated in de Sitter space (than in the AdS space). But it may even be impossible to define the precise ones. A fact is that even in the AdS setup which admits a precise, S-matrix-like set of observables, it is still possible to derive approximate predictions for a region which does not include the asymptotic region at infinity. Such a limited region is qualitatively the same as one in de Sitter space. That's why I think that it's obvious that if string/M-theory does allow the positive cosmological constant, it also makes it possible to calculate similar approximate quantities in a region of the de Sitter space. And everything else – predictions at a greater accuracy or observer-independence – may be physically prohibited or meaningless, due to a more massive version of the uncertainty principle.

I think that all existing versions of dS/CFT are wrong or at least physically useless and the whole logic that makes the people look for this kind of stuff is misguided for the reasons above. There is no reason why something like that should exist. On the other hand, one may derive effective field theories from the string vacua – and their parameters, like the gauge couplings and particle masses, are in principle calculable precisely. I think that this statement remains true and the possibility remains real even if the cosmological constant is positive and the spacetime ends up being de-Sitter-like. I think that nothing we have learned contradicts the possibility that we may derive totally precise parameters of an effective field theory expanded around a de Sitter space from string/M-theory. If you accept this way of linking string theory to detailed particle physics, the search for a "boundary of our de Sitter space" is perfectly useless and orthogonal to the things that physically matter.

Susskind also describes the de Sitter Penrose diagram, apparently identical to an enternal black hole, and discusses the entanglement between the "antipode" and the "pode" which Susskind believes to be the opposite of an "antipode". As a cultural European, I feel the moral duty to explain to the uncultivated American Mr Susskind that a "pode" isn't the opposite of an "antipode". An "antipode" is a person with the feet pointing in the opposite direction while a "pode" is just a foot, from the Greek πούς (poús). And a person with the misdirected feet isn't the opposite of the feet themselves. Thanks for your understanding. But I got distracted. ;-) I don't see much point in discussing the precise entanglement and correlations if one can't design an experimental protocol that will test this entanglement; and/or if one can't define the separate physics of the two Hilbert spaces. And it's obvious that we don't know how to make these exponentially precise measurements of the correlations in the dS space, isn't it? So why should we discuss it?

OK, I am still distracted. Juan Maldacena has been too shy for almost 3 decades but he should have taught Susskind and others that his name isn't "One" (at most "The One"). "One" may be OK in Mexican Spanish, e.g. for Susskind's Mexican janitor, but Maldacena is Argentinian and Juan is pronounced "Khoo-un" Thank me very much, Juan, you are welcome. ;-)

As far as I can see, what is going on is that these de Sitter or dS/CFT rants have been trying to find "elegant, precise, or integrable constructions" analogous to the unbroken SUSY or AdS/CFT ones at least for 20 years – I would say it is at least 22 years now – but it seemed pretty self-evident to me (and it still does) that nothing like that exists. So why would you waste 20 years with such a thing? On the other hand, the fact that the ugly de Sitter space without a mixed-signature asymptotic region and without the niceties of unbroken SUSY prevents us from a nicely controllable, integrable construction does not mean that it isn't the right background recommended by string/M-theory or quantum gravity for our world.

Then there is the whole issue of the de Sitter temperature. Susskind says that it is the only temperature at which de Sitter may have the right symmetry. Well, let me tell you something. Quite generally, if the temperature is totally precise, it means that the system is described by the very precise density matrix $$\exp(-\beta H)$$. The tiny but nonzero temperature of the de Sitter space primarily means that you can't cool it to zero, without destroying the basic shape of the space, i.e. the very existence of pure states is banned in the de Sitter space! There is almost certainly some (application of the) uncertainty principle that prevents you from building a complete set of commuting observables that would be consistent (all of them) even with the rough de Sitter geometry or topology. And that impossibility means that you can't prepare the system in a pure state and all the doable calculations are density-matrix-like. Any effort to discuss a precise construction of Hilbert spaces with pure states may very well be impossible and I think that it is. But this still doesn't mean that there is something wrong with de Sitter as a possible background of string/M-theory. It's just a background where you can't produce pure initial (or final) states. The preparation of the initial density matrix may very well depend on some priors, like in Bayesian inference, and this dependence on the priors may be as impossible to remove as the uncertainties for $$\Delta X,\Delta P$$ in regular quantum mechanics. In de Sitter space, the thermal noise is unavoidable and the occupation numbers in the deeply infrared modes (whose wavelength is comparable to the de Sitter radius) are unavoidably uncertain! Also, you shouldn't compute scattering amplitudes but the inclusive cross sections (like in the usual treatment of infrared divergences, the de Sitter radius is the infrared cutoff)!

Susskind has also placed the holographic screen on the de Sitter horizon, surely not the first person who makes the guess. It may be right or wrong and neither possibility seems to have terribly interesting consequences. The horizon etc. is a fast scrambler but I couldn't see anything new in the comments using this sexy buzzword. OK, after some combinations of these ideas, Susskind talked about the Boltzmann fluctuations and combined them with the $$ij$$-bilocal degrees of freedom in Matrix theory. I have tried to generalize them in many contexts but here I didn't quite understand whether he claimed to "derive" the relevance of the Matrix-theory-like degrees of freedom from some properties of de Sitter, or he just combined two ideas that have nothing to do with each other, and if he did, I didn't understand what this combination was good for.

Some Susskind's Boltzmann fluctuation formula only worked for $$D=4$$, as Juan pointed out, and Susskind didn't care, apparently suggesting that $$D=4$$ is required for a consistent de Sitter. I don't believe it, it is an extraordinary claim. Instead, Juan's observation that the formula only had the right scaling for $$D=4$$ meant that the justification of the formula was wrong.

We also saw Susskind's successful effort to simplify the everyone-to-everyone graph so that the system is still a fast scrambler and he decided that a graph that is as sparse as cabbage ("expander graphs") is still OK but parsley is no longer enough for fast scrambling. Excellent, probably a nontrivial mathematical result but I don't see how it could be interesting for a physicist. It seems to me that they have answered a similar question to the question "how many screws you may remove from a Michelson interferometer so that it still disproves the aether wind". No screws, one screw, 11 screws, a cabbage of screws? Unless you have another result that makes the answer important, I just don't care. It is not physically relevant.

Various comments and questions were contributed by Banks, Bousso, Maldacena, and Witten.

To summarize, I have the constant perception – and it gets manifested at so many, a priori independent, places – that Susskind conflates "what is true" (or compatible with string theory or quantum gravity) and "what is simple or admitting integrable structures". In particular, I find it almost self-evident that there is no AdS/CFT-like beautiful "integrable structure" in the de Sitter space and it's been foolish to look for one. De Sitter is warmer and messier than AdS, it has new kinds of unavoidable uncertainties and upper bounds on the precision of experiments. I would add that a complete set of commuting observables is impossible to be found in dS theories and consistent with the approximate dS locality, and that's why you can't work with pure states and you need to compute inclusive probabilities with the de Sitter radius as the infrared cutoff, just like in the calculations with infrared divergences.

The focus on the expander graphs has been a new example that struck me. Susskind and pals may be right that expander graphs produce "fast scramblers" much like some matrix models or Yang-Mills theories for black holes and their horizons. But clearly a complex or non-integrable enough systems are generically fast scramblers. It is not "unusual" to get a fast scrambler – a fast scrambler is some generic "non-integrable" dynamics which is the rule, not the exception. At most, one may get a psychological toy model for the fast-scrambling, complex behavior. But a "toy model for a complex behavior" sounds pretty stupid to me me because as long as the toy model is a good representation of what we're interested in, it will still be messy because by definition, we are interested in a messy thing! This worshiping of fast scramblers looks like Wolfram's worshiping of non-integrable systems of rules and I find it totally silly because non-integrable rules are the rule, not the exception.


text:
# Towards a Liouville theorem for continuous viscosity solutions to fully nonlinear elliptic equations in conformal geometry

Li, Y
Wang, B
NGUYEN, L

2019

## Last Updated:

2019-07-21T00:25:34.61+01:00

## abstract:

We study entire continuous viscosity solutions to fully nonlinear elliptic equations involving the conformal Hessian. We prove the strong comparison principle and Hopf Lemma for (non-uniformly) elliptic equations when one of the competitors is $C^{1,1}$. We obtain as a consequence a Liouville theorem for entire solutions which are approximable by $C^{1,1}$ solutions on larger and larger compact domains, and, in particular, for entire $C^{1,1}_{\rm loc}$ solutions: they are either constants or standard bubbles.

1004696

Submitted

Chapter


text:
News: There is a new Ehell Kindness Project!  Check it out in the "Extending the Hand of Kindness" folder or here: http://www.etiquettehell.com/smf/index.php?topic=139832.msg3372084#msg3372084

• September 27, 2016, 12:42:44 AM

### Author Topic: S/O Beggars, Moochers and Scammers  (Read 1426390 times)

0 Members and 1 Guest are viewing this topic.

#### *inviteseller

• Member
• Posts: 1821
• I am Queen Mommy
##### Re: S/O Beggars, Moochers and Scammers
« Reply #1845 on: October 22, 2013, 09:08:30 AM »
Well it's finally happened to me, my debit card information has been stolen.  The only place it seems like they could have stolen the information from is PayPal.

I bought a computer on line from Ebay last week, I payed for it through Paypal, two days later and my checking account is wiped out.  Thankfully, it's a week before I get payed so they don't get too much, and I've already contacted one merchant and I'm getting my money back from them.  The thief bought a watch on line and was sending it a place in California that according to the merchant is used for forwarding items to other locations, probably overseas.

They did have my debit card number, security code, phone number and billing address.  I was able to get a hold of my bank last night and cancel the card so they won't be able to make any more purchases.  All in all, it could have been a lot worse that what it is. I'm off to the bank in a few minutes to see about the other charges and hopefully get some more of my money back.

Back in August, I get a phone call from my bank.  It was their fraud department asking me if I had made a $3 395 purchase of electronics from an overseas location. Once I could breath again, I said "Heck no!!!!" We went through the last 5 days of transactions and found a bunch of little fishing ones ($1-$20) that went through then the big one. They did not approve the big one (didn't have that much money in my account) and they refunded the little ones. Took a few days to figure it out as my card was in my possession the whole time. It was a certain pay as you go phone account (they have an airline too) that 7 days earlier I had a billing dispute with as I went to stop the account. The people who I called in a certain country (funny, same country where electronics were ordered from) told me they would stop it, then double dipped the monthly payment the next day. I called them to say they took 2 payments for a phone service I had cancelled and the jerk on the other end argued they did not (looking at my bank print out buddy boy) and that my payments had declined -no, I saw what you did (I was watching my account due to me not trusting them) and then when I said I had proof he said it was never an automatic payment (yes it was, for 2 years). The guy was very rude, called me a deadbeat said they would cancel my phone (I cancelled it moron!) and boom, that night fraud charges started coming through. The woman at the bank said this is a problem with the foreign companies..she sees at least 2-3 cases a week of credit card fraud originating from the call centers. I put a complaint in with the phone company, but they didn't care. My bank took good care of me, cancelling my card and getting me a new one ASAP, refunding all fraudulent charges including the double dipped phone charge. When the due date for the phone I no longer want came the next month, I get a phone call from their call center..a very rude man telling me that my payment did not go through, how was I paying for the bill this month, they were going to shut the phone off, I was responsible for paying blahblahblah. I just started laughing. I said "I cancelled it in the beginning of August, you shut it off, double billed me, then stole my bank card info for a shopping spree so if you call again, I will have an attorney contact you all about the harassment" . Payment date, if I still had phone service, is Thursday..let's see if they call. #### darling • Member • Posts: 445 ##### Re: S/O Beggars, Moochers and Scammers « Reply #1846 on: October 22, 2013, 09:13:19 AM » At best, he had low blood sugar so badly that his brain had quit working - otherwise, chemicals not appropriate to a Scout leader were in his blood stream...because nobody would hand over a dozen boys to such an obvious idiot! Would they? Oh, you'd be surprised... #### daisy1679 • Member • Posts: 90 ##### Re: S/O Beggars, Moochers and Scammers « Reply #1847 on: October 22, 2013, 09:20:44 AM » I had that happen to me once, but a different store! I was 8 or 9, and all I wanted for my birthday was Bon Jovi - New Jersey. Got it, tore it open, popped it in, and ... Scorpions (the album with Winds of Change). I was so disappointed, especially since the store didn't have any other copies of Bon Jovi in stock, so I had to get a different tape. Never did get that Bon Jovi album... It's not too late. http://www.ebay.com/bhp/bon-jovi-new-jersey-cd Sorry, just saw this. I actually have their Cross Roads album, so I have all the songs I want off New Jersey Still love Bon Jovi #### unnalee • Member • Posts: 114 ##### Re: S/O Beggars, Moochers and Scammers « Reply #1848 on: October 22, 2013, 09:40:37 AM » My office just got a call from a person who sounded like he was in a very busy call center. He didn't identify himself or the company he supposedly was working for. Just launched into asking me to give him the make and model of the copier in our office. Yeah, like I haven't heard that one before... So, to have a little fun and see where this went, I asked why he needed to know that information. He said he represented the Blahblahblah Publishing Co. who were rewriting the operating manual for our copier. He wanted to verify which one we had to that they could send us a new one. I put on my best "innocent, young woman who doesn't know any better" voice, and asked all kinds of circular questions, just to keep him on the phone and to stop him scamming someone else. He finally got to the point of almost yelling at me to just give him the make and model number, and I finally flatly said, "NO. This is a scam." He hung up on me. #### Carotte • Member • Posts: 1930 ##### Re: S/O Beggars, Moochers and Scammers « Reply #1849 on: October 22, 2013, 09:51:13 AM » Well it's finally happened to me, my debit card information has been stolen. The only place it seems like they could have stolen the information from is PayPal. I bought a computer on line from Ebay last week, I payed for it through Paypal, two days later and my checking account is wiped out. Thankfully, it's a week before I get payed so they don't get too much, and I've already contacted one merchant and I'm getting my money back from them. The thief bought a watch on line and was sending it a place in California that according to the merchant is used for forwarding items to other locations, probably overseas. They did have my debit card number, security code, phone number and billing address. I was able to get a hold of my bank last night and cancel the card so they won't be able to make any more purchases. All in all, it could have been a lot worse that what it is. I'm off to the bank in a few minutes to see about the other charges and hopefully get some more of my money back. A friend of mine got her Credit Card info hacked twice in 3 months. First was through an online merchant and meant she didn't have a working CC when we left for a 10 day holiday (she had received the new card but not the code, we had friend check her mail for it), second time the card info was copied in an ATM in another country A, she had to cancel the card mid-trip and it's her only one. She was gripping that she had to jump through so many hoops* this second time around, I told her that the bank fraud department most likely flagged her account and that she should be happy that the law here means the bank has to reimburse her. 'Funny' thing is that this is the most on line and offline personal-info security conscious person I know, who shreds everything that has her name on it and so on. (*first time she only had to tell them which where the fraudulent charges, I think it was only one, second time she had to provide a bunch of info that the bank has outlined on their contract, so it's not them making it difficult, it's them doing their job.) #### LadyJaneinMD • Member • Posts: 2934 ##### Re: S/O Beggars, Moochers and Scammers « Reply #1850 on: October 22, 2013, 10:32:20 AM » I was hacked too, just a couple of weeks ago!! It was my first hacking, and boy was I mad! I had just set up something with my Paypal account, and the next day the hacking occurred, so I thought it was through there. So, I wrote to Paypal, to my bank, to the company that I had set up through Paypal, AND to the company whose name showed up on my bank account. It looked exactly like what I had heard here - a tiny transaction to see that the card worked, then they cleaned out my account. Fortunately, it was a very small account, so they only got$50.

On Monday morning, I called my bank and my debit card was cancelled for that account.  The bank said that it looked like the card was hacked, not the account, so Paypal was off the hook.  The company I had set it up for was off the hook, too.   I actually received an email from the company that stole the money!! It's a video game company based in Prague.(Google is my friend!)   They said that it looked like I was the victim of fraud, and would I email them the lines from my bank statement that reflected the fraud.  So I emailed them those 2 lines.   The next day I received another email from the company, saying that my money would be refunded!

On Thursday, the money was back in my bank account.  Whew.  Then Friday I received a paper letter from another large company, saying that they'd been hacked and 'someone may have accessed your debit card information, including the security code', and the letter listed all of the companies that were under them, and yes, I had bought something through one of them!  But that card is no longer valid, and the problem is over.  I was refunded!

For the record, I got this idea from a bank, since I did not have a credit card at the time:  Open a 2nd checking account at your same bank(mine let me have it for free), one that only you access and that does *not* have a direct deposit to it.  Use this account for only online transactions.  So, when I pay bills online, I move money into that account for the bills, then pay the bills.  That's how the guy only got $50, and didn't wipe out my entire bank account, which would have been devastating. #### Elfmama • Member • Posts: 7005 • Derailing threads since 2001! ##### Re: S/O Beggars, Moochers and Scammers « Reply #1851 on: October 22, 2013, 11:11:19 AM » Their membership in the Boy Scouts of America has been revoked permanently and they have been stripped of their positions in their troop. ~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~ Common sense is not a gift, but a curse. Because then you have to deal with all the people who don't have it. ~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~ #### jedikaiti • Swiss Army Nerd • Member • Posts: 3593 • A pie in the hand is worth two in the mail. ##### Re: S/O Beggars, Moochers and Scammers « Reply #1852 on: October 22, 2013, 01:29:41 PM » I just had to get a new debit card recently, too. Only one weird charge showed up -$29 to PeoplePC (the charge said in Boulder, CO, but the only PeoplePC I could find is an ISP out of Georgia). Got a new card, but need to talk to the credit union about where we are on getting that \$29 back.
What part of v_e = \sqrt{\frac{2GM}{r}} don't you understand? It's only rocket science!

"The problem with re-examining your brilliant ideas is that more often than not, you discover they are the intellectual equivalent of saying, 'Hold my beer and watch this!'" - Cindy Couture

#### SamiHami

• Member
• Posts: 4222
• No! Iz mai catnip! You no can haz! YOU NO CAN HAZ!
##### Re: S/O Beggars, Moochers and Scammers
« Reply #1853 on: October 22, 2013, 02:59:10 PM »
Got an oldie but a goodie today. Just a few minutes ago had a toner phoner call my office. Luckily the girl that answered the call asked me what to do, as she was going to innocently give them the model number of our copier. I had her transfer the call to me. The caller stated that she needed to update their records and wouldn't I please get that model number for her? When I asked what company she worked for she hung up on me.

It's such an old scam, but I realized the first time I got a call like that, our receptionist hadn't been born yet, so I can't fault her for it! It just burns me up that people are willing to pull this crap and potentially get other people in trouble on the job.

What have you got? Is it food? Is it for me? I want it whatever it is!

#### Twik

• Member
• Posts: 29748
##### Re: S/O Beggars, Moochers and Scammers
« Reply #1854 on: October 22, 2013, 03:19:21 PM »
The ironic thing about the rock-topplers is that if you're scared of a "goblin" (as the rock formation was known), why go to a place called Goblin State Park? Apparently, there are thousands of the formations there. Were they going to knock each one over?

Perhaps they should have taken the scouts on a trip to a padded room or somewhere safer.
My cousin's memoir of love and loneliness while raising a child with multiple disabilities will be out on Amazon soon! Know the Night, by Maria Mutch, has been called "full of hope, light, and companionship for surviving the small hours of the night."

#### PastryGoddess

• Member
• Posts: 7109
##### Re: S/O Beggars, Moochers and Scammers
« Reply #1855 on: October 22, 2013, 03:58:34 PM »
You don't need to have used your card online or in another country to have your number and information hacked.  Apparently there are devices that can read people's card info wirelessly.  A friend of mine got a card stolen that way.
Maryland

#### jedikaiti

• Swiss Army Nerd
• Member
• Posts: 3593
• A pie in the hand is worth two in the mail.
##### Re: S/O Beggars, Moochers and Scammers
« Reply #1856 on: October 22, 2013, 04:09:32 PM »
You don't need to have used your card online or in another country to have your number and information hacked.  Apparently there are devices that can read people's card info wirelessly.  A friend of mine got a card stolen that way.

Or by someone using a skimmer - I've heard of them attached to ATMs, gas pumps, and even hand-helds being used by someone in a position to be trusted with your card for a legitimate purchase.
What part of v_e = \sqrt{\frac{2GM}{r}} don't you understand? It's only rocket science!

"The problem with re-examining your brilliant ideas is that more often than not, you discover they are the intellectual equivalent of saying, 'Hold my beer and watch this!'" - Cindy Couture

#### VorFemme

• Member
• Posts: 15572
• It's too darned hot! (song from Kiss Me, Kate)
##### Re: S/O Beggars, Moochers and Scammers
« Reply #1857 on: October 22, 2013, 04:23:01 PM »

At best, he had low blood sugar so badly that his brain had quit working - otherwise, chemicals not appropriate to a Scout leader were in his blood stream...because nobody would hand over a dozen boys to such an obvious idiot!  Would they?

Oh, you'd be surprised...

Not really, not since the day some idiots wondered if Everclear (180 proof or 90% alcohol) would burn - after they'd been drinking some of it...so they went out on their dorm porch to test it with a match & some rags...as the police drove by.

It was not easy to keep a straight face while reading them the riot act AND taking stripes & pay from them for the administrative discipline.  (As a waitress in college, I had lit liquors with lower alcohol content for flaming desserts and drinks.)

You don't need to have used your card online or in another country to have your number and information hacked.  Apparently there are devices that can read people's card info wirelessly.  A friend of mine got a card stolen that way.

My debit card was hacked the first day of vacation earlier this summer.  I now have an aluminum wallet in my purse just for the debit and credit cards with the RFID (is that the right acronym?) symbol on them.

I also looked up the duct tape wallet instructions and found that the guy doing them apparently got hacked, too - there is now an option to make a duct tape wallet with a layer of aluminum foil in it to protect your credit and debit cards.

I'd prefer a fabric option - but haven't found metallized fabric that I can test to see if it really is going to protect my cards - so I'll stick to the aluminum wallet for now!
« Last Edit: October 22, 2013, 04:28:18 PM by VorFemme »
Let sleeping dragons be.......morning breath......need I explain?

#### Katana_Geldar

• Member
• Posts: 2943
##### Re: S/O Beggars, Moochers and Scammers
« Reply #1858 on: October 22, 2013, 04:44:52 PM »
You don't need to have used your card online or in another country to have your number and information hacked.  Apparently there are devices that can read people's card info wirelessly.  A friend of mine got a card stolen that way.

Or by someone using a skimmer - I've heard of them attached to ATMs, gas pumps, and even hand-helds being used by someone in a position to be trusted with your card for a legitimate purchase.
They can also have a bogus EFTPOS machine or a hidden camera to steal your PIN.

#### LazyDaisy

• Member
• Posts: 1270
##### Re: S/O Beggars, Moochers and Scammers
« Reply #1859 on: October 22, 2013, 05:15:40 PM »
A gas station near where I work was busted about a year ago -- someone had placed a device on the telephone line that is used to process payments made at the pump. Police were investigating many complaints of ID theft and narrowed it down to one business that all the victims had in common. No one noticed the extra equipment connected to the line. The owners, who had purchased the business a few months prior, claimed they knew nothing and the equipment was there when they took over. I don't really know the full resolution of the case.

With all of the ways that thieves can steal account information, I don't know that there is a foolproof way to stop it except by keeping a very close watch on all accounts and credit reports and reporting fraud immediately. That said, I think the vast majority of ID theft is still by someone the victim knows -- a family member, friend, romantic partner, house visitor who was left unattended and got into a wallet or desk drawer. If I have maintenance people coming into my apartment, I make sure my mail isn't sitting on my desk and I put important papers that I can't shred into the trunk of my car -- and any papers I have in my car, I take out when I take my car to a mechanic. It takes almost no time for someone to pocket a piece of paper. It sounds like a lot of effort but I keep tax returns, birth certificate, passport, titles, insurance policies, important receipts, etc. in one box and shred anything that doesn't absolutely need to be kept. This is handy too in case of emergency.
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# Example of a group which is abelian and has finite (except the $e$) and infinite order elements.

Exercise 7: Show that the elements of finite order in an abelian group $G$ form a subgroup of $G$

I just solved this exercise but I can't find example of a group which is abelian and has finite (except the $e$) and infinite order elements. Are there any well known such groups?

For not abelian group with other properties group of matrixes I know.

What about the group $\mathbb{Z}_2\times\mathbb{Z}$ ? $(1,0)$ has finite order and $(1,1)$ has infinite order.

The multiplicative group of units $U$ from $(\mathbb{C},+,\cdot)$ is an abelian group. Of the real numbers in $U$, $-1$ has order $2$, and besides $e=1$, all other real numbers will have infinite order. Also, $i \in U$ and $i$ has order 4.

$-1$ and $i$ are both examples of $2^{nd}$ and $4^{th}$ roots of unity, respectively. That is, they are solutions to $z^2=1$ and $z^4=1$, respectively.

In general, an $n^{th}$ root of unity in $\mathbb{C}$ is a complex number $z$ satisfying $z^n=1$. For every $n \in \mathbb{N}$ there are $n$ distinct complex numbers which satisfy $z^n=1$, $z=1$ being a solution for every $n \in \mathbb{N}$.

Any infinite finitely generated abelian group that is not a free group will satisfy this property. This follows from the classification theorem, as any such group will have the form

$\mathbb{Z}_{m_{1}}\times\cdots\mathbb{Z}_{m_{r}}\times\mathbb{Z}^{n}$

for some $m_{1},\ldots,m_{r}\geq 2$ and some $n\geq 1$, and $m_{1}\vert m_{2}\vert\cdots\vert m_{r}$.

The example $\mathbb{Z}_{2}\times \mathbb{Z}$ given by pritam above is the the easiest such example and is a great one to show why the given property is satisfied.


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My Math Forum Positive Definite

 Linear Algebra Linear Algebra Math Forum

 January 28th, 2017, 10:35 AM #1 Senior Member   Joined: Mar 2015 From: New Jersey Posts: 1,053 Thanks: 85 Positive Definite Given a quadratic form: $\displaystyle Q=x'Ax=x_{i}A_{ij}x_{j}$, summation convention, A symmetric. Let P diagonalize A: $\displaystyle D=P^{-1}AP$. Let $\displaystyle x=Py$. Then $\displaystyle Q=y'Dy=\lambda _{i}y_{i}^{2}$, which is positive for all y if $\displaystyle \lambda$ are all positive. Question: Why is $\displaystyle x'Ax$ positive for all x?
 January 30th, 2017, 03:35 PM #2 Senior Member   Joined: Mar 2015 From: New Jersey Posts: 1,053 Thanks: 85 Range of values of x'Ax doesn't change under non-singular linear substitution.
January 30th, 2017, 11:31 PM   #3
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Math Focus: Dynamical systems, analytic function theory, numerics
Quote:
 Originally Posted by zylo Given a quadratic form: $\displaystyle Q=x'Ax=x_{i}A_{ij}x_{j}$, summation convention, A symmetric. Let P diagonalize A: $\displaystyle D=P^{-1}AP$. Let $\displaystyle x=Py$. Then $\displaystyle Q=y'Dy=\lambda _{i}y_{i}^{2}$, which is positive for all y if $\displaystyle \lambda$ are all positive. Question: Why is $\displaystyle x'Ax$ positive for all x?

It isn't necessarily. However, when it is, this is the definition of a positive definite matrix. If you are assuming that $A$ is positive definite then this follows immediately from what you have written since all eigenvalues are non-negative.

If you aren't assuming this, then here is a simple counterexample which shows not every symmetric matrix is positive definite.

$$\left\( \begin{array}{cc} 1 & 0 \\ 0 & -1 \\ \end{array} \right)$$

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location:  Publications → journals → CJM
Abstract view

Classification of Linear Weighted Graphs Up to Blowing-Up and Blowing-Down

Published:2008-02-01
Printed: Feb 2008
• Daniel Daigle
 Format: HTML LaTeX MathJax PDF PostScript

Abstract

We classify linear weighted graphs up to the blowing-up and blowing-down operations which are relevant for the study of algebraic surfaces.
 Keywords: weighted graph, dual graph, blowing-up, algebraic surface
 MSC Classifications: 14J26 - Rational and ruled surfaces 14E07 - Birational automorphisms, Cremona group and generalizations 14R05 - Classification of affine varieties 05C99 - None of the above, but in this section


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# how to get 450 dpi

If you set your mouse DPI to more than 2000 DPI, the mouse pointer going to be much much faster that you won’t be able to control it unless you use Windows precision (acceleration) settings. The higher your DPI, the more sensitive your mouse is. Choosing a different density is common for interface elements and for certain output devices that reproduce the size of something based on the ppi in the image file instead of sizing to fit on a page or other unit of measure. You probably advised us to modify the DPI for the mouse. This is due to the fact that the resolution of the image is higher, and therefore the image has more details. If your mouse has a DPI of 1600, it will move 1600 pixels for every 1 inch you move it. 3747 Minnehaha Ave First, take your mouse in your hands, is there any extra button? Press question mark to learn the rest of the keyboard shortcuts Things can go complex when if your mouse is not clocked at standard 400 DPI, you can use some tips I found on other blogs. You can print the same image with different DPI, and use them in different cases.

Before we get all technical, please note that DPI concerns only images, photos and visual files destined to be printed or rendered on a screen. Read this for better understanding of what is DPI, PPI and CPI (explained).

Bye, Hi, I want image output size of 5X4 ie 1500 x1200 pixel but when i put this numbers actual image i am getting is 1500 x 844.

The mouse that has extra keys or functionalities has software that can be utilized to customize the way buttons work, assign buttons to do a certain task. Look for a DPI or sensitivity related settings. In fact, such DPI conversion is the most frequent.

At one time not that long ago, most displays were 72 dpi or 96 dpi.

The DPI image is modified using the appropriate software.

When this option is turned on, forgot the DPI, because it changes the overall sensitivity, in most cases, it decreases DPI. Enter values as noted below and then click OK. To change resolution and keep density the same, type in a new pixel width or height, or change units to inches or other another measurement to specify the target size. and changing sensitivty makes it worse then you should buy a new Mouse with those DPI and better ppolling rate. (The ppi measurement has a complementary term you may hear, too, known as “pitch,” or the distance between the center of two adjacent pixels.). For more awesome image compression and optimization tools, check out our best image optimization plugins for WordPress. Set the bar to middle (6th point) it won’t skip a pixel. If the DPI is 400, then 400 points on one inch on your mousepad will be tracked, the sensitivity is 400 points for the area of one inch on the mousepad. Enhance pointer precision: It allows mouse pointer to move according to the pace you drag the mouse. Saving the height and width of the image is possible only when you lower the DPI. This is very small, but for Web pages this is acceptable, since, although the images are far from perfect, they are small in size, and are loaded more quickly.

For images in Windows, 96 DPI is used. Dot/inch: Pixel/centimeter: Note: Fill in one box to get results in the other box by clicking "Calculate" button. Here’s where you will use it.

You have ended my four day lengthy hunt!

When using this program, remember the recommendations in this article about the standard DPI values.

You can download the software for Logitech mice (Windows & MAC OS) on Logitech G hub here.

So it’s easy to determine mouse DPI if it has dedicated DPI button, extra software and listed in specifications. Those computer mice are useful when you’re editing images and videos or doing something that requires precision movement. Depending on what you need your mouse for, you might want to know your mouse DPI (especially when you are just about to buy it).

The downside is that you need to get used to it and it can be tiresome. This is the manual way of knowing the DPI in which you literally measure. You can also reduce DPI without changing the height and width of the image.

Such a question including what is my mouse dpi and have no specific answer. Good for higher granularity, slightly less consistent. It is expressed as the number of DPIs (dots per linear inch) that a device can detect. Resolution defines how much information or distinct detail is in an image, measured in pixels. It’s quite easier or simpler for end-users to know what is the meaning of sensitivity in terms of a point & click than you understand DPI. Dots Per Inches is the number of individual dots placed in a line within the span of 1 inch. What I am trying to say here is, don’t get fooled by Higher DPI is better, you move fast but the aim will go potato. Uproer

There are also programs that allow the user to enter the desired DPI value himself. It is vital for you to know that this method is less likely to give a precise measurement, as it requires you to take averages. PO: Being a Gamer I can tell you some tips which might benefit you in games like Apex Legends, CSGO, and Valorant. There are programs that allow you to select from a fixed set of permissions (for example, 72 DPI, 300 DPI, etc.).

Usually, Gamers will go for one with high DPI for quick sensitivity. #201 Some good suggestion would be Logitech, Redimp (cheaper) and you might want to avoid anything which has “gaming” or “RGB” written, such text and RGB never helped any gamer and only burns money.

Remember the two points I said you should mark on your Mouse pad or table or paper?

Help would be very much appreciated :)) Take a measuring tape against your screen to determine the width of the red line below in inches. Your email address will not be published. For example, if you have got a 1080P Monitor and a conventional 1600 DPI mouse, you will see a fast mouse pointer movement. However, you’d more realistically print a photo up to 8 by 10 inches on a 200 dpi or 300 dpi ink-jet printer, or post an image several inches wide at high density on a web page. There are several ways to check the DPI of your mouse easily.

When printing images, different resolutions are used. Feel free to try this DPI sensitivity calculator for quick and reliable results. I went from 1600 to 800 and then to 450 over the course of a month or two. Currently, images in JPG, PNG, TIF, BMP and ICO formats are supported. I’d suggest a balanced DPI.

Go here first. Using 150 DPI gives printed images a good quality, but if you want to get good image quality, you should use 300 DPI (or even 600). Email yours to mac911@macworld.com including screen captures as appropriate, and whether you want your full name used. Then find the average to get your mouse DPI. Required fields are marked *. DPI stands for Dots per inch. Copyright © 2020 IDG Communications, Inc. Resolution refers effectively to the amount of information in an image, and more concretely to its dimensions measured in pixels.

Looking for a post but can't find it? Use the two marks on your mouse pad/table/paper to draw a line until you reach the 1 inch, as measured with your rule. This field is for validation purposes and should be left unchanged. For example, gamers usually want a high DPI mouse for quick sensitivity and fast scrolling. How can you tell the difference and provide what’s needed?

It is very easy to get your mouse DPI using this method. Save my name, email, and website in this browser for the next time I comment. PS: You will see a number like “0, 200px” when try to do this. When performing a DPI change, it is important to remember some standard permissions.

then you dont get more precision buy buying a more dpi mouse.
Only if the speed is to slow.

For me ,everything above 450 dpi on mine 1920x1080 monitor i lose precision.
Because its to fast for me ,but i can still be superfast.
I'm faster with 450 dpi then a 1800 dpi mouse even when i used both long time to get used to it.
Are you looking for how to check your mouse DPI on Windows 7, 8 or 10?

If you decide to switch to a lower sens/dpi, don't drop it all in one go. Open Windows Settings, press Windows + I.

DPI converter has the option to “resample the image”, when this option is set, your image will change in size according to the DPI specified in it.For example, you had an image of 300DPI and 4*6 inches (1200*1800 pixels).If you set it to 72DPI, the image size in centimeters will not change, but the size will change in pixels (it will be 288 * 432 pixels). I believe checking and testing for your mouse DPI could not be any easier if you follow this guide very well. In fact, if your mouse DPI is adjustable, you can use this method to change your mouse DPI to the one you want in real life. Now, you will see a red crosshair under this settings as seen below. $${1143 dpi × 36 mm \over 25.4 mm} = 1620 Pixel$$ Slide scanning for print a Poster - Slide Size : 24 x 36 mm Poster Size : 900 x 600 mm Scanner Resolution: 4000 dpi DPI 1:1 Senior Contributor,

Determine DPI using Paint (Gearchunnk): Keiko’s tip can help you knowing mouse DPI, the result should be close to your actual DPI. DPI relates to the resolution of your screen. DO NOT TRY TO USE 1 pixel on MS Paint. Sometimes you need to go to a lower DPI, because all other image parameters (the number of megabytes, and the sizes in height and width) with decreasing DPI also decrease. on Convert Pixels to Inches Easily With This Image Size Calculator, best image optimization plugins for WordPress. And in Valorant I find 0.6 (1 Default) sensitivity is optimal for me, again this is 800+ DPI, so in the long run, you can set 800 DPI as your default. Your email address will not be published. Since the mouse pointer bar has 11 points, setting it to 6 works as a native DPI of your Mouse. Pick any DPI and stick to it, I use 1600 DPI but in Apex sensitivity is 1/2 which is similar to 800 DPI. Pointer speed: you can set pointer speed on a scale of 11. Click on the Pencil icon again and do this as many times as possible. Next, the DPI you choose is highly dependent on how you intend to use the image. Here are resources for you to find, or calculate, the DPI of your device. Popular brand mouse companies like Logitech, Bloody or Razer, they have dedicated softwares that allow you to control and change the Mouse DPI in real time. DPI is also called CPI, which stands for “counts per inch”. A simple introduction to DPI. Read our, Learn more about Macworld's Digital Edition.

Abbreviation DPI stands for “dots per inch”, and is related to the quality of your photo. Smaller devices typically have higher ppi because you hold them closer; monitors have lower ppi for the same reason. This is a little better, but still does not go in comparison with the resolution used to print images. DPI Love has a compiled a searchable list of devices and their DPI values. Every question won’t be answered, we don’t reply to email, and we cannot provide direct troubleshooting advice. NOTE: I read 679 px, 671 px, 662 px and 684 px using first dimension at the bottom left corner after placing my Pencil icon where the line ends at 1 inch (as measured by my ruler after moving the mouse). Make sure that your Pencil icon is still at the zero pixel point (the leftmost side of your working area) on MS Paint.

If you are using Windows (without another brand), download the Mouse and Keyboard center here. By Glenn Fleishman,

Next, disable pointer precision on your PC. For example, for images on the Internet, 72 DPI is usually used. We recommend that you use our image converter and specify the required DPI when converting. https://www.mouse-sensitivity.com/dpianalyzer/, How To Activate Windows 10 For Free 2020 Permanently (Without Key). Found this page helpful? The second pixel dimension is for the vertical height (you will observe it increase as you scroll down and vice versa – That’s not what you should check. Most commonly, screens have a DPI value of 75.


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# cos 360 degrees

cos (a–b) = cos a cos b + sin a sin b. a cos θ = − b tan θ = −1.192 (give the answer to the nearest degree). Use this simple cos calculator to calculate the cos value for 360° in radians / degrees. When we divide 450 by 360, we get the remainder 90. A complete circle – 360 degrees. Between 0 and 360 degrees there are two points where the sin is 1/2: 30, 150. So instead of a circle having 360 degrees, it has 2ð radians. However, the approximate value of cos of $45$ degrees is taken as $0.7071$ in mathematics. $\cos 120 = \cos (180 -60) = – \cos 60$  . January 27, 2019 by physicscatalyst 5 Comments. Also, cos 360° = 1 and sin 360° = 0, so. The negative sign tells us that the angle is … A Computer Science portal for geeks. Cosine of 90 degrees compared to cosine of π/2 radians. The cosine is positive in Quadrants I and IV, so; cos 58 = cos(360-58) = cos 302 The angle that has the same cosine as angle 58 is 302. Cosine Calculator. Since it makes sense to start at 0 degrees, our circle will look like this: Fig 4. Steps. cos(θ) = adjacent hypotenuse cos ( θ) = adjacent hypotenuse. Image will be added soon. Cosine has a value 1 at zero degrees and a value of -1 at 180 degrees. Cross-ratios Imageing the horizontal axis is cos, and the vertical axis is sine. cos(a-b) = cosacosb + sinasinb . Please help me. It starts at 0 , heads up to 1 by π /2 radians (90°) and then heads down to −1 . So when you do your trig math, you need to translate between human degrees and C language radians. It is an irrational number and equal to $0.7071067812\ldots$ in decimal form. Since the interior and exterior angles sum to 180 degrees, the angle CPD is exactly 90 degrees, i.e., a right angle. The values of sin, cos, tan, cot at the angles of 0°, 30°, 60°, 90°, 120°, 135°, 150°, 180°, 210°, 225°, 240°, 270°, 300°, 315°, 330°, 360° = 1•cos x + 0•sin x = cos x. cosd(90) ans = 0 cos(pi/2) ans = 6.1232e-17 Cosine of complex angles specified in degrees. cos(360 - x) = cosx When we have the angles 90Â° and 270Â° in the trigonometric ratios in the form of. Show work y2 +4y+1 ; y = -2 . So, r = 360˚ Example: cos x tan x = cos x \\frac{sin x}{cos x} = sin x = 1/2 The sine of 30 degrees is 1/2. This video shows how to find the exact trig values of 0 and 360 degree. In order to calculate sin(x) on the calculator: Enter the input angle. Select angle type of degrees (°) or radians (rad) in the combo box. Also, at 150 degrees. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor. It is easy to remember and sign is decided by the angle quadrant. Realizing that the tangent function is the ratio of sine and cosine makes the problem much easier. In the first quadrant (0Â° to 90Â°), all trigonometric ratios are positive. Here is a printable sine-cosine-tangent table for all integer angle values in degrees, from 0° to 360°. Another way to think about it is that we have gone one complete revolution round the unit circle. As the third side of the triangle does not exist (length is 0), the cosine equals zero (0 divided by the length of the hypotenuse equals 0). Once your account is created, you'll be logged-in to this account. The result can be shown in multiple forms. Here in this post, I will provide Trigonometric table from 0 to 360 (cos -sin-cot-tan-sec-cosec) and also the easy and simple way to remember it. Trigonometric table for 0 to 90 is given by, And this can be easily remember by below method, How to easily remember trigonometric ratios table, Trigonometric table(sin-cos-tan table) for 0 to 360 is given by, Now to remember the Trigonometric table for 120 to 360 , we just to need to remember sign of the functions in the four quadrant. Trigonometric table from 0 to 360 cos sin cot tan sec cosec trigonometric functions of angles greater than 360 degrees trigonometric tan chart tangent values table from 0 to 360 trigonometry table trigonometric ratios sin cos tan chart. The Trignometric Table of sin, cos, tan, cosec, sec, cot is useful to learn the common angles of trigonometrical ratios from 0° to 360°. cosd(90) ans = 0 cos(pi/2) ans = 6.1232e-17 Cosine of complex angles specified in degrees. ADD SUGAR TO COFFEE 45 degrees A circle has 360 degrees. Imagine a circle which has 360 degrees and a radius of 1. Sine, Cosine, and Tangent Table: 0 to 360 degrees Degrees Sine Cosine Tangent Degrees Sine Cosine Tangent Degrees Sine Cosine Tangent 0 0.0000 1.0000 0.0000 60 0.8660 0.5000 1.7321 120 0.8660 ‐0.5000 ‐1.7321 1 0.0175 0.9998 0.0175 61 0.8746 0.4848 1.8040 121 0.8572 ‐0.5150 ‐1.6643 Trigonometric ratios are important module in Maths. I have noticed that students cannot actually remember values of six trigonometric ratios (sin, cos, tan, cosec, sec and cot) for 0, 30, 45, 60 and 90.These values are used very often and it is recommended from my point of view that student should be able to tell the values instantly when asked. It is also expressed as the square root of three divided by two. For example, let us consider the angle 450°. 12.5% * 360 degrees = 0.125 * 360 degrees = 45 degrees What fraction is 360 degrees? If someone could please explain how to get started, I'd appreciate it. To find the value of cos 180 degrees from the Cartesian plane, the value 180 degree takes place in the second quadrant. Plot of Cosine Solving linear equations using elimination method, Solving linear equations using substitution method, Solving linear equations using cross multiplication method, Solving quadratic equations by quadratic formula, Solving quadratic equations by completing square, Nature of the roots of a quadratic equations, Sum and product of the roots of a quadratic equations, Complementary and supplementary worksheet, Complementary and supplementary word problems worksheet, Sum of the angles in a triangle is 180 degree worksheet, Special line segments in triangles worksheet, Proving trigonometric identities worksheet, Quadratic equations word problems worksheet, Distributive property of multiplication worksheet - I, Distributive property of multiplication worksheet - II, Writing and evaluating expressions worksheet, Nature of the roots of a quadratic equation worksheets, Determine if the relationship is proportional worksheet, Trigonometric ratios of some specific angles, Trigonometric ratios of some negative angles, Trigonometric ratios of 90 degree minus theta, Trigonometric ratios of 90 degree plus theta, Trigonometric ratios of 180 degree plus theta, Trigonometric ratios of 180 degree minus theta, Trigonometric ratios of 270 degree minus theta, Trigonometric ratios of 270 degree plus theta, Trigonometric ratios of angles greater than or equal to 360 degree, Trigonometric ratios of complementary angles, Trigonometric ratios of supplementary angles, Domain and range of trigonometric functions, Domain and range of inverse  trigonometric functions, Sum of the angle in a triangle is 180 degree, Different forms equations of straight lines, Word problems on direct variation and inverse variation, Complementary and supplementary angles word problems, Word problems on sum of the angles of a triangle is 180 degree, Domain and range of rational functions with holes, Converting repeating decimals in to fractions, Decimal representation of rational numbers, L.C.M method to solve time and work problems, Translating the word problems in to algebraic expressions, Remainder when 2 power 256 is divided by 17, Remainder when 17 power 23 is divided by 16, Sum of all three digit numbers divisible by 6, Sum of all three digit numbers divisible by 7, Sum of all three digit numbers divisible by 8, Sum of all three digit numbers formed using 1, 3, 4, Sum of all three four digit numbers formed with non zero digits, Sum of all three four digit numbers formed using 0, 1, 2, 3, Sum of all three four digit numbers formed using 1, 2, 5, 6, Equations of horizontal and vertical lines, Equation of Horizontal and Vertical Lines Worksheet, Comparing Slopes of Two Lines - Concept - Examples, 90Â° means, after having completed one circle of 360, Â°, the position of the angle will be at 90. Radians ( rad ) in the given angle ( -870Â° ) has negative sign tells us the! And sec are positive automatically create an array of three complex angles and their corresponding sine cosine! Starts at 0 degrees, and 330 degrees radians based on reference angles, but i do n't have idea. And cos 90° cos is the ratio of sine and cosine makes the problem much easier ( –. A circle the horizontal axis is cos, and the discirimnat please help me phrases! And equal to $0.7071067812\ldots$ in mathematics the organization but also to the employees the given ratio angles! 57.2957795 degrees, and other study tools 1 holds 0° to 180° ; page 2 shows 181° 360°! 360 = sin 0 degree then cos 360 is also expressed as the square of! The cos 360 degrees of and 270Â° in the figure shown below & 60 & &... Cosx + sin360 * sinx degrees is Shifting by 180 degrees equals 0.01745329 radians equals 57.2957795 degrees, quadrants! Trigonometry signs 0.125 * 360 degrees, the remainder function, it values! Sign tells us that the exact value of cos 180° cos 360° = 1 and sin ( )... Based on reference angles, but i 'm not sure how to overcome it:?... Reason cos 360 degrees cosine of 90 degrees compared to cosine of a degrees it... Take the remainder the definition of cosine and tangent of 360 degrees to assume it falls in fourth... Points P such that angle CPD is a full rotation of 360 degrees for trigonometry! Value of cos of another number, please Enter the input angle and exterior angles sum to 180 degrees and. No difference at all, so we have 0 degree IIT-JEE Physics and Maths θ... Tangent function is the 1st quadrant, 90-180 the 2nd, 180-270 the,. A circle C language radians number and equal to -1/2 at 210, and one degree 0.01745329... The tangent function is equal to -1/2 at 210, and the ordered pair is −1. C language radians cosine makes the problem much easier 360° = 1 sin. Chart lists the corresponding cosine value would be done by most mathematicians,. Type of degrees ( ° ) or radians based on reference angles, but 'm. Trigonometric ratios in the second quadrant ( 180Â° to 270Â° ), Tan cot... Learned to do other degrees or radians in a circle, of which CD is a rotation. Root of three divided by 360, the quadrants are named by 90-degree segments a cos θ ≤.. Remainder 0 x + 0•sin x = cos 360° = 0 cos θ! Great way of remembering circle which has 360 degrees and simplify the trigonometric ratios are negative sum! = cos360 * cosx + sin360 * sinx in which they lie that we have at degrees! The expression makes no difference at all, so we have the 0Â°... Plot of cosine Shifting by 180 degrees will obtain the value of cos θ ≤ 1 should check the of. Please help me bisecting BC into two equal parts repeats values every 360 degrees when divide. You need to translate between human degrees and C language radians find the sin and csc are positive and trigonometric! = 90Â° means, after having completed one circle of 360Â°, the remainder is.. That works out to 6.2831 ( which repeats every 2 π radians, as would be done by mathematicians... Divide 870 by 360, we have to assume it falls in the fourth.. Degree angles, after having completed one circle of 360Â°, the 360 degrees the. To 360Â° ), all trigonometric ratios are negative the fourth quadrant ( 0Â° to 90Â° ), Tan cot... Between positive and negative depending on the indicated circle satisfies the given triangle AB. Cos 30°, cos 60° and cos values from 0 to 360,! Degrees but it is giving me my answers in radians coterminal with 180, and 270-360 4th... Also, cos and sec are positive and negative depending on the determines! 765 is divided by 360, we should not make the above conversions y cosd! 360 by 360, the 360 degrees there are two points where the sin 1/2... That angles are measured in radians or degrees table is helpful to evaluate and simplify the trigonometric ratios are.. My Uno to find the sine, cosine and sine the cosine table. $degrees is taken as$ 0.7071 $in mathematics 270 & 360 degree angles one degree equals 0.01745329.! Page 2 shows 181° to 360° cos θ is 1 θ ) = cos 360° = 1 for =... Account for you in our website or degrees = – \cos 60.! Could please explain how to approach 360 degrees values from 0 to 360 degrees * 360 degrees Tan! Find the known sides of the triangle from multiple sources is extremely valuable not only to the organization also... When you do your trig math, you 'll be logged-in to this.... 360° ) -1 at 180 degrees twice interior and exterior angles sum to 180 degrees formula be. In cos 360 degrees of circular repulsion quadrant always take a negative value 60$ sign on each the... Root of three divided by two, after having completed one circle of 360Â° the! Side / hypotenuse of the triangle, 12th and IIT-JEE Physics and Maths and cosine the. 45X = -200 using the quadratic formual and the discirimnat please help me remainder 0 and 180Â°, have... Of 6 decimal digits trigonometry signs sin 360° = 1 for θ = − b Tan =... Divided by 360 degrees there are two points where the sin and cos values 0. When θ = −1.192 ( give the answer to the nearest degree ) and sign is decided the. Range from 1 to -1 expression makes no difference at all, so and practice/competitive programming/company interview Questions between and. The vertical axis is cos, and the ordered pair is ( −1, )! ) in the combo box quadrant determines the sign on each of the unit circle right triangle or. Other study tools 'm not sure how to get started, i 'd appreciate it not make the conversions... Quadrant ( 90Â° to 180Â° ), sin and cosine makes the problem easier... 450 by 360… since the circle is commonly divided into 360 degrees is as... 12Th and IIT-JEE Physics and Maths commonly divided into 360 degrees, and one degree equals 0.01745329 radians the. ( x ) = cos 360° = 1 and sin ( 0 =. ( 180Â° to 270Â° ), sin and cosine of 360 degrees, the range of values of cos =. A negative value cos chart lists the corresponding cosine values in the fourth quadrant ( 0Â° to 90Â° ) cos! Sin ( 0 ) = cos x for this reason the cosine values table is helpful to and! 1/2: 30, 150 for this reason the cosine of 30° thought well... Corresponding sine, cosine and sine the cosine that we have to assume it falls in the combo.. First quadrant ( 180Â° to 270Â° ), sin and csc are positive and other trigonometric ratios negative... Is – 1 ≤ cos θ is –1 when θ = 0˚ and 360˚ angle is ratio! Value of cos θ is 1 when θ = 90˚ and 270˚ to -1/2 210... Us that the tangent function is the perpendicular which is 2 cos 360 degrees 3.1415 ) radians in circle! = 6.1232e-17 cosine of the complementary angle, 90-180 the 2nd, 180-270 3rd! Would be 0.707107 measure = π × 360/180 gone one complete revolution round the circle... A circle thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company Questions., our circle will look like this: Fig 4, all trigonometric ratios are negative ( )... ( −1, 0 ) one circle of 360Â°, the quadrants are by!: Enter the input angle approximate solutions on custom range ( 90 ) ans = 6.1232e-17 of. Following phrases explained computer science and programming articles, quizzes and practice/competitive interview! Little demo in Processing of circular repulsion radians, as would be 0.707107 heads up to 1 π... Which repeats every 2 π radians, or 360° ) hypotenuse of the triangle sine cosine... Exactly the same as the cosine values around the unit circle, it has been explained clearly in form... Circle range from 1 to -1 * 360 degrees = 0.125 cos 360 degrees degrees... 0.7071 \$ in decimal form cos 0°, cos 30°, cos 60° and cos 90° is... Following phrases 2 × 3.1415 ) radians in a circle, of which CD is a function... 360° = 1 for θ = −1.192 ( give the answer to the degree... × 360/180 360Â° and 180Â°, we have to divide 765 by 360 degrees = degrees! Circle showing cos ( θ ) = adjacent hypotenuse values in the given angle, with a precision of decimal! Solution can be remembered easily using the quadratic formual and the ordered pair (. The answer to the employees commonly divided into 360 degrees, our circle look... = 180˚ circle which has 360 degrees in the combo box 180Â° ), all trigonometric ratios the... Expressed either in radians or degrees works out to 6.2831 ( which repeats every π. Any idea how to overcome it ≤ cos θ ≤ 1 270Â° ) cos 360 degrees and...? list=PLJ-ma5dJyAqogqcBOQk-1kbwyOzpLu17u the cosine values around the unit circle right triangle but is!


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# Recent questions tagged cat2007

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How many pairs of positive integers $m, n$ satisfy $\frac{1}{m} + \frac{4}{n}=\frac{1}{12}$,where $n$ is an odd integer less than $60?$ 4 7 5 3
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Directions for the below question: Let $S$ be the set of all pairs $(i, j)$ where $1 \leq i \leq j < n$ and $n \geq 4$. Any two distinct number of $S$ are called friends' if they have one constituent of the pairs in common and enemies' otherwise. For example, if $n=4$ ... $\frac{1}{2} (n^2 - 5n +8)$ $2n-6$ $\frac{1}{2} n(n - 3)$ $n-2$ $\frac{1}{2} (n^2 - 7n + 16)$
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Directions for below question: Shabnam is considering three alternatives to invest her surplus cash for a week. She wishes to guarantee maximum returns on her investment. She has three options, each of which can be utilized fully or partially in conjunction with others. Option A: Invest in a ... 36% in option C 1/3 in each of the three options 30% in option A, 32% in option B and 38% in option C
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Directions for below question: Mr. David manufacturers and sells a single product a fixed price in a niche market. The selling price of each unit is Rs.30. On the other hand, the cost, in rupees, of producing x units is $240+bx+cx^2$ where $b$ ... the profit. What is the maximum daily profit, in rupees, that Mr.David can realize from his business? 620 920 840 760 cannot be determined
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Directions for the below question: Let $a_1=p$ and $b_1 =q$ where $p$ and $q$ are positive quantities. Define: $a_n pb_{n-1} \: \: \: b_n=qb_{n-1}$ for even n>1 and $a_n pa_{n-1} \: \: \: b_n=qa_{n-1}$ for odd n>1 If p=1/3 and q= 2/3, then what is the smallest odd $n$ such that $a_n + b_n < 0.01$? 7 13 11 9 15
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In the question there are four sentences. Each sentence has pairs of words/phrases that are italicized and highlighted. From the italicized and highlighted word(s)/phrase(s), select the most appropriate word(s)/phrase(s) to form correct sentences. Then, from the options ... water began to rise over[A]/above[B] the danger mark, the signs of an imminent were clear. BAABA BBBAB AAABA BBAAB BABAB
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In the question there are four sentences. Each sentence has pairs of words/phrases that are italicized and highlighted. From the italicized and highlighted word(s)/phrase(s), select the most appropriate word(s)/phrase(s) to form correct sentences. Then, from the options ... on a real[A]/true[B] story. One suspects that the compliment[A]/complement[B] was backhanded. BABAB ABBBA BAABA BBAAB ABABA
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Read the passage and answer the question. To discover the relation between the rules, paradigms and normal science, consider first how the historian isolates the particular loci of commitment that have been described as accepted rules. Close historical investigation ... paradigm that may emerge from a tradition Paradigms are a general representation of rules and beliefs of a scientific tradition
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Read the passage and answer the question. To discover the relation between the rules, paradigms and normal science, consider first how the historian isolates the particular loci of commitment that have been described as accepted rules. Close historical ... certain paradigm of scientific inquiry Loyalty to a global patterns of scientific inquiry Loyalty to evolving trends of scientific inquiry
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The following question has a paragraph from which the last sentence has been deleted. From the given options, choose the sentence that completes the paragraph in the most appropriate way. Mma Ramotsve had a detective agency in Africa, at the foot of Kgale hill. These ... too. She was a good detective and good woman. What she lacked in possessions was more than made up by a natural shrewdness.
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The following question has a paragraph from which the last sentence has been deleted. From the given options, choose the sentence that completes the paragraph in the most appropriate way. Nevertheless, photographs still retain some of the magical allure that the ... human nature being what it is, little time has passed after photography's inventions became means of living life through images.
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Read the passage and answer the below question. The difficulties historians face in establishing cause-and-effect relations in the history of human societies are broadly similar to the difficulties facing astronomers, climatologists, ecologists ... to establish cause and effect relationships Cultural anthropologists have overcome the problem of confounding variables through natural experiments
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Read the passage and answer the below question. The difficulties historians face in establishing cause-and-effect relations in the history of human societies are broadly similar to the difficulties facing astronomers, climatologists, ecologists and evolutionary ... suffer from the inability to conduct controlled experiments and therefore have explanations based on a few long-term factors.
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In the below questions, there are five sentences or parts of sentences that form a paragraph. Identify the sentence(s) or part(s) of sentence(s) that is/are correct in terms of grammar and usage. Then choose the most appropriate option. It is sometimes told that democratic government originated in ... us the word, hence did not provide us with a model. A, B and D B, C and D B and D B only D only
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In the below questions, there are five sentences or parts of sentences that form a paragraph. Identify the sentence(s) or part(s) of sentence(s) that is/are correct in terms of grammar and usage. Then choose the most appropriate option. So once an economy is actually in recession, The ... policies have no affect on the overall behavior of the economy A, B and E B, C and E C and D E only B only
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Read the passage and answer the following question. Human biology does nothing to human society. Age may enfeeble us all, but cultures vary considerably in prestige and power they accord to the elderly. Giving birth is a necessary condition for being a mother, but it is not ... development of skill and expertise leaving little time for manifestation of self. A only B only C only A and B B and C
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Read the passage and answer the following question. Human biology does nothing to human society. Age may enfeeble us all, but cultures vary considerably in prestige and power they accord to the elderly. Giving birth is a necessary condition for being a ... were physically weaker than their followers, they would still dominate them. Waiters would have stringer motivation to serve their customer.
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Read the passage and answer the give question. Every civilized society lives and thrives on a silent and profound agreement as to what is to be accepted as the valid mould of experience. Civilization is the complex system of dams, dykes and cannels warding off, ... Renaissance. Poets and artists who revitalize and enrich the past for us Poets and artists who delve in flotsam and jetsam in sea.
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Read the passage and answer the give question. Every civilized society lives and thrives on a silent and profound agreement as to what is to be accepted as the valid mould of experience. Civilization is the complex system of dams, dykes and cannels warding off, ... on artistic labour and its aim lessens Understand the elements that one has to deal with. Delve into natural experience and real waves
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Directions for the below question. Cities A and B are in different time zones. A is located 3000 km east of B. The table below describes the schedule of an airline operating non-stop flights between A and B. All the times indicated are local and on the same day. Departure ... east to west at 50 km per hour. What is the plane's cruising speed in km per hour? 700 550 600 500 cannot be determined
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Directions for the below question: Each question is followed by two statements A and B. Answer each question using the below instructions. Mark(1) if the question can be by using statement A alone but not by using statement B alone. Mark(2) if the question can be answered by ... the tank is at least 8 meters. The tank weighs 30,000 kg when empty, and is made of a material with density of 3gm/cc
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Directions for the below question: Each question is followed by two statements A and B. Answer each question using the below instructions. Mark(1) if the question can be by using statement A alone but not by using statement B alone. Mark(2) if the question can be answered by sing ... successful. Why Rahim is unable to draw the square? The length of OM is twice that of OL. The length of OM is 4 cm
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Directions for the below question: Each question is followed by two statements A and B. Answer each question using the below instructions. Mark(1) if the question can be by using statement A alone but not by using statement B alone. Mark(2) if the question can be answered by sing statement B alone ... What is the maximum possible value of $x^2 +y^2 + Z^2$? x+y+z=89 Among x, y, z two are equal
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Directions for the below question: The question is followed by two statements A and B. Answer each question using the below instructions. Mark(1) if the question can be by using statement A alone but not by using statement B alone. Mark( ... background. Number of male employees having an engineering background is 20% more than the number of female employees having engineering background.
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Directions for the below question: The question is followed by two statements A and B. Answer each question using the below instructions. Mark(1) if the question can be by using statement A alone but not by using statement B alone. Mark(2) if the question can be answered ... median. Who among the five got the highest rank? Atul was the last rank holder. Bala was not among the top two rank holders.
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Directions for the below question: The question is followed by two statements A and B. Answer each question using the below instructions. Mark(1) if the question can be by using statement A alone but not by using statement B alone. Mark(2) if the ... were in the school? Sixty percent of the top academic performers were not athletes. All top academic performers were not necessarily athletes.
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Answer the following question based on the information given below: The proportion of male students and the proportion of vegetarian students in a school are given below. The school has total of 800 students, 80% of whom are in the Secondary Section and rest ... Except non-vegetarian females, all other groups have same number of students. All of the above groups have same number of students
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Answer the following question based on the information given below: The proportion of male students and the proportion of vegetarian student students in a school are given below. The school has total of 800 students, 80% of whom are in the Secondary Section and rest equally divided ... Section 0.55 Total 0.475 0.53 What is the percentage of male students in the secondary section? 40 45 50 55 60
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Answer the following question based on the information given below: The proportion of male students and the proportion of vegetarian student students in a school are given below. The school has total of 800 students, 80% of whom are in the Secondary Section and rest ... are male. What is the difference between the number of female vegetarians and male non-vegetarians? less than 8 10 12 14 16
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Answer the following question based on the information given below: The following table shows the break-up actual costs incurred by a company in last five years [year 2002 to year 2006] to produce a particular product. The production capacity of the company is 2000 units ... sell as many units as it desires. How many units the company should produce to maximize its profit? 1400 1600 1800 1900 2000
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Answer the following question based on the information given below: The following table shows the break-up actual costs incurred by a company in last five years [year 2002 to year 2006] to produce a particular product. The production capacity of the company is 2000 units. The selling ... units, what is the maximum profit, in rupees, the company can earn? 25,400 24, 400 31, 400 32, 900 32, 000
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Answer the following question based on the information given below: The following table shows the break-up actual costs incurred by a company in last five years [year 2002 to year 2006] to produce a particular product. The production capacity of the company is 2000 units. The ... What is the minimum number of units that the company needs to produce and sell to avoid any loss? 313 350 383 747 928
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Answer the following question based on the information given below The table shows the comparative costs, in US Dollars, of major surgeries in USA and a select few Asian countries. Procedure Comparative Costs in USA and some Asian countries (in US ... quality into account which country/countries will be the most expensive for knee replacement? India Thailand Malaysia Singapore India and Singapore
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Answer the following question based on the information given below The table shows the comparative costs, in US Dollars, of major surgeries in USA and a select few Asian countries. Procedure Comparative Costs in USA and some Asian countries (in US Dollars) USA ... it. Which country will result in the cheapest package, taking cost of poor quality into account? India Thailand Malaysia Singapore USA
35
Answer the following question based on the information given below The table shows the comparative costs, in US Dollars, of major surgeries in USA and a select few Asian countries. Procedure Comparative Costs in USA and some Asian countries (in US Dollars) USA India ... the cost of poor quality? It costs 7500 Bhats for one-vary travel between Thailand and India. 23500 40500 57500 67500 75000
36
Answer the following question based on the information given below: A low-cost airline company connects ten Indian cities, A to J. The table below gives the distance between a pair of airports and the corresponding price charged by the company. Travel is permitted only from ... to be covered in flying from A to J that minimizes the total cost per kilometre for the company? 2170 2180 2315 2350 2390
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Answer the following question based on the information given below: A low-cost airline company connects ten Indian cities, A to J. The table below gives the distance between a pair of airports and the corresponding price charged by the company. Travel is permitted only from a departure to an ... the minimum cost per kilometre that the company incurs in flying from A to J? 0.77 0.88 0.99 1.06 1.08