MCQ
$\frac{d}{d x}\left(\operatorname{cosec}^{-1} x\right)=?,|x|>1$
- ✓$\frac{-1}{|x| \sqrt{x^2-1}}$
- B$\frac{1}{|x| \sqrt{x^2-1}}$
- C$\frac{1}{|x| \sqrt{x^2+1}}$
- D$\frac{-1}{|x| \sqrt{x^2+1}}$
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