$\int_{-\frac{\pi}{4}}^{\frac{\pi}{4}} \left( \frac{x+\frac{\pi}{4}}{2-\cos 2x} \right) dx$ का मान ज्ञात कीजिए।

  • A
    $\frac{8\pi\sqrt{3}}{5}$
  • B
    $\frac{2\pi\sqrt{3}}{9}$
  • C
    $\frac{4\pi^2\sqrt{3}}{9}$
  • D
    $\frac{\pi^2}{6\sqrt{3}}$

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Difficult
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यदि $A=\int_0^{\infty} \frac{1+x^2}{1+x^4} d x$ और $B=\int_0^1 \frac{1+x^2}{1+x^4} d x$ है,तो

$\int_{\frac{-\pi}{2}}^{\frac{\pi}{2}}(x^5-x^3 \cos x+\sin^3 x-3) \, dx = $ . . . . . .

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