Question

help please.... someone check my work

Answer 1

my work :

Answer 2

Oh boy, you made it a lot harder for yourself by distributing the 1/2 :(

Answer 3

^Always take fractions outside integrals

Answer 4

\[\large\rm \left[\frac12(1+\cos2x)\right]^2\quad=\frac14\left[1+\cos2x\right]^2\]

Answer 5

Neega you didn't make a diagram

Answer 6

lool Dx

Answer 7

You should always make a diagram to make sure you're doing it right, it looks like you did, but still.

Answer 8

And you should combine like-terms after expanding out the square.
Why didn't you combine the middle terms? :p
You so silly..

Answer 9

oh so true hahaha

Answer 10

Your answer is correct though.
I just don't like the way you got there XD lol

Answer 11

lool