જો $\int \frac{\sin x}{\sin (x-\alpha)} dx = px - q \log |\sin (x-\alpha)| + c$ હોય,તો $pq =$ . . . . . . .

  • A
    $-\frac{1}{2} \sin 2\alpha$
  • B
    $\sin 2\alpha$
  • C
    $\frac{1}{2} \sin 2\alpha$
  • D
    $-\sin 2\alpha$

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