यदि $90^{\circ} < A < 180^{\circ}$ और $\sin A = \frac{4}{5}$ है,तो $\tan \frac{A}{2} =$

  • A
    $\frac{1}{2}$
  • B
    $\frac{3}{5}$
  • C
    $\frac{3}{2}$
  • D
    $2$

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