$\int_{-1}^{3} \left[ \tan^{-1} \left( \frac{x}{x^{2}+1} \right) + \tan^{-1} \left( \frac{x^{2}+1}{x} \right) \right] dx =$

  • A
    $\pi$
  • B
    $2 \pi$
  • C
    $\frac{\pi}{2}$
  • D
    $\frac{\pi}{4}$

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$\int_0^\pi x \sin x \, dx = $

निश्चित समाकलनों के गुणों का उपयोग करके,$\int_{0}^{\frac{\pi}{2}}(2 \log \sin x-\log \sin 2 x) d x$ का मान ज्ञात कीजिए।

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$\int_{0}^{\pi} \frac{x \, dx}{1+\cos \alpha \sin x}, (0 < \alpha < \pi)$ का मान ज्ञात कीजिए।

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