differentiation

Question: Differential coefficient of ${\sec ^{ - 1}}x$ is

1) $\frac{1}{{x\sqrt {1 - {x^2}} }}$

2) $ - \frac{1}{{x\sqrt {1 - {x^2}} }}$

3) $\frac{1}{{x\sqrt {{x^2} - 1} }}$

4) $\frac{{ - 1}}{{x\sqrt {{x^2} - 1} }}$

Solution:

Explanation: Explanation

standard-differentiation

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