$\tan (\cos ^{ - 1}x)$ is equal to
- A$\frac{\sqrt {1 - x^2}}{x}$
- B$\frac{x}{1 + x^2}$
- C$\frac{\sqrt {1 + x^2}}{x}$
- D$\sqrt {1 - x^2}$
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Medium
View SolutionIf $\cos^{-1} x = y$, then $\dots \dots \dots$
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