If , then is equal to

Maths Trigonometrical Ratios, Functions and Identities All Topic Question for Revision Test Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 12, 2026

Text Solution

Verified by Experts

The correct answer is:

Relate the Identities:

Given , square both sides to link them:

Substitute and

Solve for

Let

Solving for the positive root:

Find

Taking the square root gives

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