Figuring Out Integral for Nevermind I Seem to Have

[roeb]

Nevermind, I seem to have figured it out

Homework Statement

show that:
\int \frac{dN}{N} = \int_{0}^{\theta_max} \frac{dcos \theta}{2} \frac{1 + \frac{v^2}{v_0^2} cos(2 \theta ) }{ \sqrt{ 1 - \frac{v^2 sin^2 \theta}{v_0^2} } }

Homework Equations

The Attempt at a Solution

I'm having a lot of difficulty doing this...
Note that sin(\theta_{max} ) = \frac{v_0}{v}
so after a bunch of algebra I get:

\int \frac{dN}{N} = cot(\theta_{max} ) \int_{0}^{\theta_{max} } \frac{2y^2 - 1}{\sqrt{y^2 - 1} }
I am fairly confident that is correct because I keep on getting it.
Unfortunately, I can't seem to integrate this at all.

 

[rootX]

<br /> \int \frac{dN}{N} = cot(\theta_{max} ) \int_{0}^{\theta_{max} } \frac{2y^2 - 1}{\sqrt{y^2 - 1} }<br />

If you are finding it hard to integrate the right side, try u = sqrt(y^2-1) .. fairly simple to integrate