$\int_{0}^{1} \sin \left( 2 \tan^{-1} \sqrt{\frac{1+x}{1-x}} \right) \, dx = $

  • A
    $\pi / 6$
  • B
    $\pi / 4$
  • C
    $\pi / 2$
  • D
    $\pi$

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Difficult
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$n \in N$ के लिए,$\int_{0}^{n\pi + V} \sqrt{\frac{1 + \cos 2x}{2}} dx$ का मान . . . है (जहाँ $\frac{\pi}{2} < V < \pi$)

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