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marigirl
 one year ago
Can you please explain..
integrate 2 cos^2(x)
marigirl
 one year ago
Can you please explain.. integrate 2 cos^2(x)

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0probs a good idea to use trig identities

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\cos(2x)=2\cos ^{2}(x)1\]

marigirl
 one year ago
Best ResponseYou've already chosen the best response.1so then i have: 2 cos^2(x)=cos(2x)+1

marigirl
 one year ago
Best ResponseYou've already chosen the best response.1when i integrate that I get sin(2x)/2 + x....... the ans says sin(x)cos(x)+x

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0use trig identities for sin(2x)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0sin(2x) = 2sin(x)cos(x)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0probs a good idea to have a cheat sheet by your side when you do these problems

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0cheat sheet of trig identities...

marigirl
 one year ago
Best ResponseYou've already chosen the best response.1even the cheat sheet is complicated :(

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0not if you know what you are looking for! if you find it hard to integrate something and its not your basic cosx sin(x) etc...then most likely its a trig identity you need to use to replace it

marigirl
 one year ago
Best ResponseYou've already chosen the best response.1or i just need to do more problems! haha

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yep, repitition and u will be a gun

marigirl
 one year ago
Best ResponseYou've already chosen the best response.1thanks for that website link!
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