यदि $\int \frac{dx}{1 + \sin x} = \tan \left( \frac{x}{2} + a \right) + b$ है,तो

  • A
    $a = \frac{\pi}{4}, b = 3$
  • B
    $a = -\frac{\pi}{4}, b = 3$
  • C
    $a = \frac{\pi}{4}, b = \text{स्वेच्छ अचर}$
  • D
    $a = -\frac{\pi}{4}, b = \text{स्वेच्छ अचर}$

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