यदि $I=\int \frac{\sin x+\sin ^3 x}{\cos 2 x} \,d x=P \cos x+Q \log \left|\frac{\sqrt{2} \cos x-1}{\sqrt{2} \cos x+1}\right|+c,$ (जहाँ $c$ समाकलन का एक स्थिरांक है),तो $P$ और $Q$ के मान क्रमशः क्या हैं?

  • A
    $\frac{1}{2}, \frac{3}{4 \sqrt{2}}$
  • B
    $\frac{1}{2}, \frac{-3}{4 \sqrt{2}}$
  • C
    $\frac{1}{2}, \frac{3}{2 \sqrt{2}}$
  • D
    $\frac{1}{2}, \frac{-3}{2 \sqrt{2}}$

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यदि $f(x) = \int \frac{x^2 + \sin^2 x}{1 + x^2} \cdot \sec^2 x \, dx$ और $f(0) = 0$ है,तो $f(1) = $

$I = \int_{0}^{\frac{\pi}{4}} \tan^{n+1} x \, dx + \frac{1}{2} \int_{0}^{\frac{\pi}{2}} \tan^{n-1} \left( \frac{x}{2} \right) \, dx$ का मान ज्ञात कीजिए।

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