# Evaluate a Trigonometric Integral

1. Oct 1, 2011

### jackychenp

Hi All,

$\int_{0}^{2\pi}d\varphi \int_{0}^{\pi}\sqrt{\frac{1}{1-sin^2\theta cos^2\varphi }}d\theta$
I tried very hard to evaluate this integral but failed. Please help me if you know how to solve it.

2. Oct 4, 2011

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3. Oct 5, 2011

### jackychenp

Thanks a lot!