જો $n$ કોઈ પૂર્ણાંક હોય,તો $\int_0^\pi {e^{\cos^2 x} \cos^3((2n + 1)x)} \, dx = $

  • A
    $x$
  • B
    $1$
  • C
    $0$
  • D
    આમાંથી કોઈ નહીં

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જો $\int_{0}^{1} 4 \cot^{-1}(1-x+x^{2}) dx = a \tan^{-1}(2) - b \log_{e}(5)$, જ્યાં $a, b \in N$, તો $(2a+b)$ ની કિંમત શોધો:

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

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