$\int_{\frac{\pi}{4}}^{\frac{3 \pi}{4}} \frac{d x}{1+\cos x}$ ની કિંમત શોધો.

  • A
    $-2$
  • B
    $-2-2 \sqrt{2}$
  • C
    $2$
  • D
    $-2 \sqrt{2}$

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