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Sin A + 2sin 2A + sin3A is equal to whic...

Sin A + 2sin 2A + sin3A is equal to which of the following?
1.`4sin 2A cos^2(A/2)`
2.`2 sin 2A (sinA/2+cosA/2)^2`
3.`8 sin A cos A cos^2(A/2)`
Select the correct answer using the codes given below:

A

A. Both 1 and 2

B

B. Both 2 and 3

C

C. Both 1 and 3

D

D. 1,2 and 3

Text Solution

Verified by Experts

The correct Answer is:
C
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