Find the exact value of each trig function below. 9 5 14. sin(x+y) if sin x=- cos x =, sin y sin y= (54) 14 14 79 9 and cos y = 10 10 4 2 5 7 15. cos(x-y) if sinx x=- COS X sin y = and cos y = 5 5 11 (54) 3 16. tan(x+y) if tan x=, tan y=. (65 4 5