differentiation

Question: $\frac{d}{dx}\left\{ {{\cos }^{-1}}\left( \frac{1-{{x}^{2}}}{1+{{x}^{2}}} \right) \right\}=$

1) $\frac{1}{1+{{x}^{2}}}$

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

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

4) $\frac{2}{1+{{x}^{2}}}$

Solution:

Explanation: No Explanation

Differentiation by substitution Higher order derivatives

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