Tuesday

September 16, 2014

September 16, 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))

**Answer this Question**

**Related Questions**

Calc - Which expression is equivalent to sin(3x) + sin x? A. 2cos(2x)sin x B. ...

Math - Which expression is equivalent to sin(3x) + sin x? A) 2cos(2x)sin x B) ...

Calc - Which functions of x and y in terms of time t can be derived from this ...

tigonometry - expres the following as sums and differences of sines or cosines ...

Precal - I do not understand how to do this problem ((sin^3 A + cos^3 A)/(sin A...

Precalculus - Verify the identities. Cos^2x - sin^2x = 2cos^2x - 1 When ...

Math, Pre-Calc - the original problem was: Solve: sin(3x)-sin(x)=cos(2x) so far ...

Math, derivatives - f(x) = x² + 2Cos²x, find f ' (x) a) 2(x+cos x) b) x - sin x ...

Ap Calc AB - Determine (dy/dx) using implicit differentiation. cos(X^2Y^2) = x I...

trigonometry (please double check this) - Solve the following trig equations. ...