જો $\int_0^\pi {xf(\sin x)dx = A} \int_0^{\pi /2} {f(\sin x)dx} $ હોય,તો $A$ ની કિંમત શું થાય?

  • A
    $2\pi $
  • B
    $\pi $
  • C
    $\frac{\pi }{4}$
  • D
    $0$

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