sin A + 2 sin 2A + sin 3A is equal to which of the following ?
1. 4 sin 2A cos²(A/2)
2. 2 sin 2A (sin²(A/2) + cos²(A/2))
3. 8 sin A cos A cos²(A/2)
Select the correct answer using the code given below :
Mathematics
2016
NDA Mathematics 2016
NDA 2016
Options
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