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October 20, 2014

October 20, 2014

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

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

- Pre-calc/Calc -
**Steve**, Wednesday, April 17, 2013 at 11:19amLooks like D to me.

sin u + sin v = 2 sin(½(u+v)) cos(½(u−v))

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