Practice free →
HomeUP Board Class 12 › Mathematics › What is $\dfrac{d}{dx}(\tan^{-1}x)$?

What is $\dfrac{d}{dx}(\tan^{-1}x)$?

A$\dfrac{1}{1-x^2}$
B$\dfrac{1}{\sqrt{1+x^2}}$
C$\dfrac{1}{1+x^2}$
D$-\dfrac{1}{1+x^2}$
Answer & Solution
Correct answer: C. $\dfrac{1}{1+x^2}$
The standard result is $\dfrac{d}{dx}(\tan^{-1}x)=\dfrac{1}{1+x^2}$. Option B is a common confusion with inverse trigonometric forms involving square roots.
Solve this in the app — UP Board Class 12 practice & 24k+ MCQs →
Related questions