Home Maths Trigonometrical Ratios, Functions and Identities Trigonometrical Ratios of Multiple and Sub-Multiple Angles If and , then is equal to
Maths Trigonometrical Ratios, Functions and Identities Trigonometrical Ratios of Multiple and Sub-Multiple Angles Single Correct MCQ
Published on: August 11, 2026

If and , then is equal to

A
B
C
D

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The correct answer is:
A

Since

⇒ ⇒

Now, and both ⇒ ⇒ .

Again, and both ⇒ ⇒

Thus, and both

⇒ ⇒ .

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