MCQ
$\frac{d}{d x}\left[\log \sqrt{\frac{1-\cos x}{1+\cos x}}\right]=$
  • A
    $\sec x$
  • $\operatorname{cosec} x$
  • C
    $\operatorname{cosec} \frac{x}{2}$
  • D
    $\sec \frac{x}{2}$

Answer

Correct option: B.
$\operatorname{cosec} x$
(B)

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