Saturday

December 20, 2014

December 20, 2014

Posted by **steve** on Wednesday, July 14, 2010 at 9:20am.

- trig -
**Henry**, Thursday, July 15, 2010 at 5:06pmGIVEN: SinX = -12 / 13

SinX = 12/13 = 0.9231, X=67.38(1st.quad.), X = 67.38 + 180 = 247.38

( 3rd. quad, ), Z

2X = 2*247.34 = 494.76

COS2X = COS 494.76 = -0.7041

**Answer this Question**

**Related Questions**

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

Trig - Find cos(s+t) if cos s= -1/2 and sin t= 3/5, s and t are in quadrant II. ...

trig - can someone please help me with this problem. i'm doing my review right ...

mth, trig - Given cos a=-7/25 in quadrant II , and sin b=-12/13, in quadrant IV...

Trig - find sin(s+t), given that sin t=1/3, t in quadrant 2, and cos s = -2/5, s...

Alg2/Trig - Find the exact value of the trigonometric function given that sin u...

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

trig - Find cos(A+B). cos A=1/3 and sin B=-1/2, with A in quadrant I and B in ...

trig - if sin a=4/5 and is quadrant 2 and sin b= 8/17 and is in quadrant 1, find...

trig - how do you work find sin (a-B)beta sign. sin a = 12/13,a lies in quadrant...