Question

For angle theta with the point (15, -8) on its terminating side, what is the value of cosine?

A) -8/18
B) 15/17
C) -8
D) 15

Answer 1

The answer is B.15/17

Answer 2

x^2 + y^2 = r^2
15^2 + (-8)^2 = [sqrt(17)]^2
r= 17

cos(theta) = x/r = 15/17
Letter B