જો $\sec(x) = \cosh(\theta)$ હોય,તો $\tanh^2\left(\frac{\theta}{2}\right)$ શોધો.

  • A
    $\sec^2\left(\frac{x}{2}\right)$
  • B
    $\tan^2\left(\frac{x}{2}\right)$
  • C
    $\tanh^2\left(\frac{x}{2}\right)$
  • D
    $\operatorname{sech}^2\left(\frac{x}{2}\right)$

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