$\int_0^{\pi /2} \frac{\cos x}{(1 + \sin x)(2 + \sin x)} \,dx = $

  • A
    $\log \frac{4}{3}$
  • B
    $\log \frac{1}{3}$
  • C
    $\log \frac{3}{4}$
  • D
    इनमें से कोई नहीं

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