We just started learning about Trigonometric Integrals and I was doing pretty good with the odd numbered ones, until I got to the even. I don't really know how to approach this problem.
Any help would be great.
Well I think I got the answer and it took me about two pages to get it trail and error.
Here's how I approached it:
I substituted with
I used half angle formula to get
I expanded everything and got
I went from there and did a few more steps and got
Can anyone check if I did it correct?