An Integral #1

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May 27th 2008, 01:09 AM
Xingyuan

An Integral #1

Can anyone calculate this integral:

$\int_0^\frac{\pi}{2}{\sqrt{\frac{(\sin\theta)^2}{\ cos\theta} + \frac{(\cos\theta)^2}{\sin\theta}}}d\theta$

thanks very much (Surprised)

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