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Question 1
The value of $\displaystyle \int_{0}^{\pi} \frac{x \sin x}{1+\cos^2 x},dx$ is:
A.
$\dfrac{\pi^2}{3}$
B.
$\dfrac{\pi^2}{4}$
C.
$\dfrac{\pi^2}{6}$
D.
$\dfrac{\pi^2}{2}$
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