MCQ

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$\int( I -\cos x) \operatorname{cosec}^2 x d x$ = ______.

• ✓
  $\tan \left(\frac{x}{2}\right)+ c$
• B
  $-\cot \left(\frac{x}{2}\right)+ c$
• C
  $-2 \cot \left(\frac{x}{2}\right)+ c$
• D
  $2 \tan \left(\frac{x}{2}\right)+ c$