Question

integral 25cos^2(x)

Answer 1

Hint: \[cos^2x = \frac{1}{2}(cos2x+1)\]

Answer 2

Hint #2: Take the constant out :P

Answer 3

(That was unnecessary ^)

Answer 4

Hmmm....
\[\int 25cos^2(x)dx\]\[=\int\frac{25}{2}(cos2x+1)dx\]The factor 25/2, which is a constant, can be pulled out of the integral..

Answer 5

what do you do after you pull out the constant?

Answer 6

Integrate it.

Answer 7

how do you integrate cos(2x)?

Answer 8

never mind i know how!