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anonymous
 one year ago
How can I solve this for x? ...
cos(pi*x) = 4x^2  1
anonymous
 one year ago
How can I solve this for x? ... cos(pi*x) = 4x^2  1

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nincompoop
 one year ago
Best ResponseYou've already chosen the best response.3dw:1439590609138:dw

nincompoop
 one year ago
Best ResponseYou've already chosen the best response.3dw:1439590681521:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ohhh but then how would you know that they intersect at those points (i mean at the xintercepts) ?

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1do intermediate value thm

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ohhh right right!! Can you help me out with it?

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1eh lol you want exact numbers that may not be a good way

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0No no haha not exact numbers xD lol just lead me in the right way and I'll take it from there

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1what i meant is that IVT that proves that in an interval there exist a solution not helpful to determine those solution so you need a different way as your question is asking to solve..

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Hmm, well I'm actually trying to solve a different question but I need to find the intersection of the 2 graphs (y=cos(pi*x) and y=4x^21) in order to solve it... I'm looking for the area of the enclosed region.

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1enclosed region dw:1439591365383:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Exactly! And I'm not sure how to find the intersection points of the 2 graphs... dw:1439591506353:dw I usually set the 2 equations to equal each other, but it doesn't work with this problem

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Is there any way to find it without using a calculator?

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1yeah that work with simple equations lol

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So not with this one?

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1i guess not with simple algebra no? could be with some advanced maneuver that uses calculus and different other stuff haha

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1yeah it is x=+1/2 the graph shows the same

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ok, the thing is, I have a Calculus final exam in a couple days and I was wondering how to go about such a question cuz we're not allowed to use calculators either...

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Refer to the attachment.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0But I guess in that case such a question wouldn't appear on an exam then, right?

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1i don't think you gonna have some problem of this sort without giving those points this needs some program haha

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@robtobey it doesn't open the file :/

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Haha good! Relief xD lol

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1you don;t have file opener of that time you need mathematica or something

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1of that type*

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yeah, whats mathematica?

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1a language or something hhh they solve problems with it i don't know either lol

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Sorry. I intended to post a pdf file.

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1mathematica is an environment i guess right @robtobey

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Now I see it :) thanks! That makes sense...

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1that was IVT usage by wolfram

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I wish it showed the solution too, but I guess you gotta go pro for that XD haha

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1it has solution x=+1/2 ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yeah, i mean the stepbystep solution

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1what steps? how it used IVT?

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1you could choose the interval [0,1] and do iterations of the thm or may be newtons method

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1that would lead to one solution close to 0.5 use symmetry then to get 0.5 that;s a lot of work

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Hmm right, I'll give that try later on And yeah its a lots of work for just finding the intersection points to then finally get to work out the area between the 2 curves... it wouldn't be reasonable to get a question like this on the exam...

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1newton's method works good lead straight to the answer more quickly

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yeah, I gotta review that again, it was from last term and I tend to forget math really soon xD hahaha

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0But thank you all for the help! I appreciate it :)

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1i just use wolfram or any other program with this stuff in exam they will give you the intersection point if this sort of question pops up

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Mhmm, hopefully it doesn't show up on the exam at all  just don't like it xD lol

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1lol depends on the prof

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0He's cruel and nice at the same time  pretty unpredictable xD haha

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Anyways wish me luck! :D Im really nervous lol

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1yeah bonne chance :)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Merci beaucoup Monsieur ;D haha

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1de rien haha

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Thats Arabic! :O haha awesome!

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1yeah it is :) Arabic is tough little bit

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yeah, I almost learned to speak it when I was little but then forgot it after a while of not working on it :/

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0But I still remember some words and can still read :D

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1oh good :) i understand french but i don't speak it fluently due to luck of practice too haha

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Same here! I understand French and German a lot better than speaking them xD French, in particular, I've studied for over 6 years and yet can't speak it xD such a shame hahaha

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1eh what shame lol i studied french for over 14 years i even studied math with french but outside school i never practiced speaking it

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Hahaha wow!! Lets just admit its a tough language xD

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1eh perhaps it is

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1eh haha forgot that

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Mmhm it sure is xD lol

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1haha could be lack of interest too i never had intereest in it

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Could be... But for me, it has always been a dream to be able to speak French  it just sounds so nice xD haha

xapproachesinfinity
 one year ago
Best ResponseYou've already chosen the best response.1haha language of romance restudy it xD

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Lol true xD certainly does sound romantic xD and I definitely will... once my schedule gets a bit lighter xD lol

nincompoop
 one year ago
Best ResponseYou've already chosen the best response.3sorry I was at work so we can solve for their intersection points manually cos(pi*x) = 4x^2  1 means cos(pi x = 0 4x^2 1 = 0

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Refer to the attachment from the Mathematica 9 program. Sort of a proof for the first quadrant.
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