Question

When finding the area between the curves y=cos2x and y=0 within the points x=pi/4 and x=pi/2, must I use u-substitution in order to find the definite integral of -cos2x?

Answer 1

it would help

Answer 2

ok thanks

Answer 3

what else would you use?
/ do

Answer 4

No idea, just making sure that is the correct approach before I start this problem. I could have been missing something considering if never found the area between two curves before.

Answer 5

I've* never found

Answer 6

in that case, yes, you use u substitution