यदि $\sin x - \sin y = \frac{1}{2}$ और $\cos x - \cos y = 1$ है,तो $\tan(x + y)$ का मान ज्ञात कीजिए।

  • A
    $\frac{3}{8}$
  • B
    $-\frac{3}{8}$
  • C
    $\frac{4}{3}$
  • D
    $-\frac{4}{3}$

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यदि $\frac{2\sin \alpha}{1 + \cos \alpha + \sin \alpha} = y$ है,तो $\frac{1 - \cos \alpha + \sin \alpha}{1 + \sin \alpha} = $

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