$\int \operatorname{cosec}(x-a) \cdot \operatorname{cosec} x \, dx = $

  • A
    $\frac{-1}{\sin a} \log \left| \frac{\sin (x-a)}{\sin x} \right| + c$
  • B
    $\frac{1}{\sin a} \log \left| \frac{\sin (x-a)}{\sin x} \right| + c$
  • C
    $\frac{1}{\sin a} \log |\sin (x-a) \cdot \operatorname{cosec} x| + c$
  • D
    $\frac{-1}{\sin a} \log |\operatorname{cosec}(x-a) \cdot \sin x| + c$

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