Sunday

December 21, 2014

December 21, 2014

Posted by **Rick** on Thursday, March 5, 2009 at 10:49pm.

sin (7pi/6 -x) + cos (2pi +x)

- trig -
**drwls**, Thursday, March 5, 2009 at 11:33pmUse the formulas for sin (A - B) and cos (A + B)

I can tell you right away that cos (2 pi + x) = cos x

**Answer this Question**

**Related Questions**

Math - 3. find the four angles that define the fourth root of z1=1+ sqrt3*i z...

math - Eliminate the parameter (What does that mean?) and write a rectangular ...

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

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

Trig - Given: cos u = 3/5; 0 < u < pi/2 cos v = 5/13; 3pi/2 < v < ...

algebra - Can someone please help me do this problem? That would be great! ...

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

Math - use Demoivre's Theorem to find the indicated power of the complex number...

Math - use Demoivre's Theorem to find the indicated power of the complex number...

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