Posted by **Kevin** on Friday, February 17, 2012 at 12:58am.

If cosx=4/5, cosy=12/13 in Quad. IV, find sin(x+y)

## Answer this Question

## Related Questions

Pre-calculus - If cosx=4/5, cosy=12/13 in Quad. IV, find sin(x+y)

Math - Suppose f(x) = sin(pi*cosx) On any interval where the inverse function y...

math - If sinx=3/5,cosy=-12/13,where x and y both lie in 2nd quad.Find the value...

trig - find the exact value given that cosA=(1/3) in quad I, sin B=(-1/2) in ...

trig - find the exact value given that cosA=(1/3) in quad I, sin B=(-1/2) in ...

trig - find the exact value given that cosA=(1/3) in quad I, sin B=(-1/2) in ...

integral Calculus - ʃsin y dy/ √1 + cosy please help..thanks.. that's...

Precalculus/Trig - I can't seem to prove these trig identities and would really ...

Calculus - Find the dervatives: 1. f(x)=(3x+1)e^x^2 2. y = e^(sin x) ln(x) 3. f(...

Math help again - cos(3π/4+x) + sin (3π/4 -x) = 0 = cos(3π/4)cosx...