Practicing Success

Target Exam

CUET

Subject

-- Mathematics - Section B1

Chapter

Inverse Trigonometric Functions

Question:

The value of $tan(cos^{-1}x)$ is :

Options:

$\frac{1}{x}$

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

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

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

Correct Answer:

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

Explanation:

The correct answer is Option (2) → $\frac{\sqrt{1-x^2}}{x}$

$\tan(\cos^{-1}x)$

Using pythagoras theorem

so $\tan(\cos^{-1}x)$

$=\tan θ=\frac{\sqrt{1-x^2}}{x}$