All I have done is subbed in sin theta and used the identity. I haven't done anything else.
sorry yeah it just looked a bit misleading to me, looked like you were saying the integral was
Unparseable latex formula:
\frac{1}{(cos^2\theta)^1^.^5}
The Hedonist - basically just use the substitution given, remember to change between dx and dtheta, the limits, and then hopefully you will be left with something you can integrate