$\int_{0}^{2 \pi} \frac{x \sin^{8} x}{\sin^{8} x + \cos^{8} x} dx$ ની કિંમત શોધો.

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

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$n \in N$ માટે,ધારો કે $P_n = \int_1^e (\ln x)^n dx$. તો $(P_{10} - 90P_8)$ ની કિંમત શોધો.

$\int_0^{2\pi } {{\cos }^{99}x\,dx} $ ની કિંમત શોધો.

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