Mathematics
Boris378
2020-04-21 10:33:30
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
ANSWERS
Moon121
2020-04-21 14:39:40

x^2 + y^2 = r^2 15^2 + (-8)^2 = [sqrt(17)]^2 r= 17 cos(theta) = x/r = 15/17 Letter B

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