$\int_{-\pi}^\pi \frac{2 y(1+\sin y)}{1+\cos ^2 y} d y$ का मान ज्ञात कीजिए:

  • A
    $\pi^2$
  • B
    $\frac{\pi^2}{2}$
  • C
    $\frac{\pi}{2}$
  • D
    $2 \pi^2$

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