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## Main Question or Discussion Point

Hi All,

[itex] \int_{0}^{2\pi}d\varphi \int_{0}^{\pi}\sqrt{\frac{1}{1-sin^2\theta cos^2\varphi }}d\theta[/itex]

I tried very hard to evaluate this integral but failed. Please help me if you know how to solve it.

[itex] \int_{0}^{2\pi}d\varphi \int_{0}^{\pi}\sqrt{\frac{1}{1-sin^2\theta cos^2\varphi }}d\theta[/itex]

I tried very hard to evaluate this integral but failed. Please help me if you know how to solve it.