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August 30, 2014

Homework Help: Pre-calc/Calc

Posted by Chris Math Hw Help on Wednesday, April 17, 2013 at 11:12am.

Which expression is equivalent to sin(3x) + sin x?

A.
2cos(2x)sin x

B.
2sin(2x)sin x

C.
-2sin(2x)cos x

D.
2sin(2x)cos x

E.
-2cos(2x)sin x

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