यदि $x \in \left(-\frac{\pi}{2}, \frac{\pi}{2}\right)$ है,तो $\log \sec x = $

  • A
    $2 \operatorname{cosech}^{-1}\left(\cot ^2 \frac{x}{2}-1\right)$
  • B
    $2 \operatorname{cosech}^{-1}\left(\cot ^2 \frac{x}{2}+1\right)$
  • C
    $2 \operatorname{coth}^{-1}\left(\operatorname{cosec}^2 \frac{x}{2}-1\right)$
  • D
    $2 \operatorname{coth}^{-1}\left(\operatorname{cosec}^2 \frac{x}{2}+1\right)$

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