Question

I need a refresher with my integration, help me with this problem:

Answer 1

\[\int\limits_{}^{}cosx^2 xdx\]

Answer 2

use substitution
put u = x^2
du / dx = 2x

Answer 3

guys im sorry! it;s cos^2 xdx

Answer 4

really really sorry

Answer 5

for this one use the identity

cos^2 x = (1/2) ( cos 2x + 1)