Wednesday

April 16, 2014

April 16, 2014

Posted by **Anonymous** on Thursday, January 20, 2011 at 2:55am.

- trig -
**Damon**, Thursday, January 20, 2011 at 6:02amin Q2 sine is negative

sin^2 + cos^2 = 1

sin^2 = 1 - 16/25 = 9/25

sin = +/- 3/5

so sin A = -3/5

sin 2A = 2 sin A cos A

=2 (-3/5)(-4/5) = 24/25

**Related Questions**

trig - cos A = -4/5 for angle A in Quadrant II, find sin 2A

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

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

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

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

trig - Find cos(a=b). sin a = 3/5, a lies in Quadrant II, and cos b = 5/13, b ...

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

Math Trig Find Quadrant I II III IV - In which quadrant is the terminal side of ...

trig - Given that sin = 3/5 and lies in quadrant II, find the following value. ...

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