यदि $\int \frac{1}{1-\cos x} dx = \tan \left(\frac{x}{\alpha} + \beta\right) + c$ है,तो $\frac{\pi \alpha}{4} - \beta$ का एक मान है

  • A
    $-\frac{\pi}{2}$
  • B
    $\pi$
  • C
    $0$
  • D
    $\frac{\pi}{4}$

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