Question

Evaluate the integral

Answer 1

\[\int\limits_{0}^{\pi/2}\cos ^3x \sin 2x dx\]

Answer 2

sin(2x) = 2 sin x cos x

then try u subsitution for cos

Answer 3

oh, i didn't know that. thanks that will make it go a lot quicker

Answer 4

i suggest you look at these

http://math.com/tables/trig/identities.htm