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Prove that : sin(3x)+sin(2x)-sinx=4sin...

Prove that :
`sin(3x)+sin(2x)-sinx=4sinxcos((x)/(2))cos((3x)/(2))`

Text Solution

Verified by Experts

The correct Answer is:
`4sinx.cos((x)/(2)).cos((3x)/(2))`
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