$\int_{-\pi}^{\pi} \frac{\cos^2 x}{1 + a^x} dx, a > 0$ का मान क्या है?

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

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$I = \int_{-\frac{\pi}{2}}^{\frac{\pi}{2}} \frac{x^2 \cos x}{1+e^{-x}} \,dx$ का मान ज्ञात कीजिए।

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$\int_0^{2 \pi} \frac{x \cos x}{1+\cos x} d x=$

मान लीजिए $I_n = \int_0^{\pi / 2} x^n \cos x \, dx$,जहाँ $n$ एक अ-ऋणात्मक पूर्णांक है। तो,$\sum_{n=2}^{\infty} \left( \frac{I_n}{n!} + \frac{I_{n-2}}{(n-2)!} \right)$ का मान ज्ञात कीजिए।

यदि $2 \int_0^1 \tan^{-1} x \, dx = \int_0^1 \cot^{-1} (1 - x + x^2) \, dx$ है,तो $\int_0^1 \tan^{-1} (1 - x + x^2) \, dx$ का मान ज्ञात कीजिए।

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