Friday

August 1, 2014

August 1, 2014

Posted by **Anonymous** on Thursday, March 1, 2012 at 7:10pm.

- trig -
**MathMate**, Thursday, March 1, 2012 at 8:49pmcos(4x) + cos(2x)

=cos(3x+x)+cos(3x-x)

=2cos(3x)cos(x)

**Related Questions**

trig--power reducing formulas - Having trouble with this problem: Rewrite the ...

trig - The expression 4 sin x cos x is equivalent to which of the following? (...

TRIG! - Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6...

Calculus (help Steve plz) - 1) if w = <-8, 15>, find ||w||? 2) which ...

pre-cal - Simplify the given expression........? (2sin2x)(cos6x) sin 2x and cos ...

Trigonometry - Write equivalent equations in the form of inverse functions for a...

Math - Solving Trig Equations - What am I doing wrong? Equation: sin2x = 2cos2x ...

Trig - Which expression equivalent to: cos(theta + pi/2). A)cos theta B)-cos ...

trig - Reduce the following to the sine or cosine of one angle: (i) sin145*cos75...

trig 26 - simplify to a constant or trig func. 1. sec Ču-tan Ču/cos Čv+sin Čv ...