MCQ
$\frac{d}{d x}\left(\operatorname{cosec}^{-1} e^x\right)=\ldots \ldots \ldots$
- A$-\frac{1}{\sqrt{e^{2 x}-1}}$
- B$\sin ^{-1}\left(e^x\right)$
- C$\frac{1}{\sqrt{e^{2 x}-1}}$
- D$-\frac{e^x}{\sqrt{e^{2 x}-1}}$
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