Trouble with Trigonometric Integral? Get Help Now!

[Physter]

Haven't done integrals in such a long time and now I'm having some trouble with this question here. Any help would be appreciated. Thanks

http://img331.imageshack.us/img331/4333/screen192cj.jpg

 

[arildno]

Using the double angle formula as you do here is of course legitimate, however, there is a simpler choice:
Substitute $u=\sin(t)$ instead.

 

[Physter]

This looks better I hope?

http://img312.imageshack.us/img312/5109/screen202ul.jpg

 

[Jameson]

+C of course :). But yes, that's correct.

 

[Physter]

^^^Arggg I always forget the constant. Thanks