$\int \sqrt{1 + \cos x} \, dx$ का मान ज्ञात कीजिए।

  • A
    $2\sqrt{2} \sin \frac{x}{2} + c$
  • B
    $-2\sqrt{2} \sin \frac{x}{2} + c$
  • C
    $-2\sqrt{2} \cos \frac{x}{2} + c$
  • D
    $2\sqrt{2} \cos \frac{x}{2} + c$

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