Monday

December 22, 2014

December 22, 2014

Posted by **shay** on Wednesday, April 18, 2012 at 11:10am.

- mth, trig -
**Steve**, Wednesday, April 18, 2012 at 11:28amsin a = 24/25

cos b = 5/13

now apply addition formulas

- mth, trig -
**shay**, Wednesday, April 18, 2012 at 2:05pmThanks but how did you find that? My numbers came out completely different -_-

- mth, trig -
**Steve**, Wednesday, April 18, 2012 at 4:25pmIf a is in QII, sin is positive, cos is negative.

7^2 + 24^2 = 25^2, so it's a 7-24-25 triangle

If b is in QIV, sin is negative, cos is positive.

5^2 + 12^2 = 13^2, so it's a 5-12-13 triangle.

what did you do to find the missing sin/cos values?

**Answer this Question**

**Related Questions**

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

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

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

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

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

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

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

trig - Find the sign of the expression if the terminal point determined by t is ...

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...