SOLUTION: The angle θ has the point (–2, 9) on its terminal side. What is the exact value of each of the following? (a) sin θ (b) cos θ (c) tan θ

Algebra ->  Trigonometry-basics -> SOLUTION: The angle θ has the point (–2, 9) on its terminal side. What is the exact value of each of the following? (a) sin θ (b) cos θ (c) tan θ       Log On


   

Question 1019030: The angle θ has the point (–2, 9) on its terminal side. What is the exact value of each of the following?
(a) sin θ
(b) cos θ
(c) tan θ
Answer by ikleyn(52879) About Me  (Show Source):
You can put this solution on YOUR website!
.
Calculate r = sqrt%28%28-2%29%5E2+%2B+9%5E2%29, the distance to the point from the origin.

sin%28theta%29 = y%2Fr

cos%28theta%29 = x%2Fr

tan%28theta%29 = y%2Fx.