यदि $\sin \alpha = \sin \beta$ और $\cos \alpha = \cos \beta$ है,तो किसी पूर्णांक $n$ के लिए $\alpha - \beta = $ क्या होगा?

  • A
    $n \pi$
  • B
    $2 n \pi + \frac{\pi}{2}$
  • C
    $2 n \pi - \frac{\pi}{2}$
  • D
    $2 n \pi$

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