જો $-\frac{\pi}{2} < \theta < \frac{\pi}{2}$ હોય,તો $\log \left(\tan \left(\frac{\pi}{4}+\frac{\theta}{2}\right)\right)=$

  • A
    $\tanh ^{-1}\left(\tan \frac{\theta}{2}\right)$
  • B
    $2 \tanh ^{-1}\left(\tan \frac{\theta}{2}\right)$
  • C
    $\operatorname{coth}^{-1}\left(\tan \frac{\theta}{2}\right)$
  • D
    $2 \operatorname{coth}^{-1}\left(\tan \frac{\theta}{2}\right)$

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