Can you please explain.. integrate 2 cos^2(x)

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Can you please explain.. integrate 2 cos^2(x)

Mathematics
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probs a good idea to use trig identities
\[\cos(2x)=2\cos ^{2}(x)-1\]
so then i have: 2 cos^2(x)=cos(2x)+1

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Other answers:

when i integrate that I get sin(2x)/2 + x....... the ans says sin(x)cos(x)+x
use trig identities for sin(2x)
sin(2x) = 2sin(x)cos(x)
thanks!
: )
http://www.purplemath.com/modules/idents.htm
probs a good idea to have a cheat sheet by your side when you do these problems
cheat sheet of trig identities...
even the cheat sheet is complicated :(
not 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
or i just need to do more problems! haha
yep, repitition and u will be a gun
thanks for that website link!
np : )

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