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Evaluate: int0^pi(xsinx)/(1+cos^2x)dx...

Evaluate: `int_0^pi(xsinx)/(1+cos^2x)dx`

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To evaluate the integral \[ I = \int_0^\pi \frac{x \sin x}{1 + \cos^2 x} \, dx, \] we will use the property of definite integrals, which states that ...
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