જો $\operatorname{cosech} x = \frac{4}{5}$ હોય,તો $\sinh x = $

  • A
    $\frac{4}{5}$
  • B
    $\frac{5}{4}$
  • C
    $\frac{2}{3}$
  • D
    $\frac{2}{5}$

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