If then | CGP Edu

Maths Trigonometrical Ratios, Functions and Identities Trigonometrical Ratios of Multiple and Sub-Multiple Angles Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 12, 2026

If then

A

B

C

D

Text Solution

Verified by Experts

The correct answer is:

Given, …. .(i)

On squaring both sides,

we get ⇒ ⇒

⇒ ⇒ ….. (ii)

Again squaring both sides,

⇒ ⇒

⇒ ⇒ ….. (iii)

Now take cube of both sides,

⇒ ⇒

⇒ ⇒

= = = .

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