$\theta \in \left(0, \frac{\pi}{2}\right)$ के लिए, $\operatorname{sech}^{-1}(\cos \theta)$ का मान ज्ञात कीजिए।

  • A
    $\log \left|\tan \left(\frac{\pi}{6}+\frac{\theta}{2}\right)\right|$
  • B
    $\log \left|\tan \left(\frac{\pi}{3}+\frac{\theta}{2}\right)\right|$
  • C
    $\log \left|\tan \left(\frac{\pi}{4}+\frac{\theta}{2}\right)\right|$
  • D
    $\log \left|\tan \left(\frac{\pi}{4}-\frac{\theta}{2}\right)\right|$

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