સંકલનનું મૂલ્ય શોધો: $\int_0^{\pi /2} \frac{1 + 2\cos x}{(2 + \cos x)^2} dx$

  • A
    $\frac{\pi }{2}$
  • B
    $\pi $
  • C
    $\frac{1}{2}$
  • D
    આમાંથી કોઈ નહીં

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