यदि $\cosh x = \operatorname{cosec} \theta$ है,तो $\coth^2 \frac{x}{2} = $

  • A
    $\tan^2 \frac{\theta}{2}$
  • B
    $\tan^2 \left( \frac{\pi}{4} - \frac{\theta}{2} \right)$
  • C
    $\cot^2 \frac{\theta}{2}$
  • D
    $\cot^2 \left( \frac{\pi}{4} - \frac{\theta}{2} \right)$

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