$\int_{\pi /2}^{\pi} \frac{1 - \sin x}{1 - \cos x} \, dx =$

  • A
    $1 - \ln 2$
  • B
    $\ln 2$
  • C
    $1 + \ln 2$
  • D
    $\text{इनमें से कोई नहीं}$

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