Question

Evaluate the function requested. Write your answer as a fraction in lowest terms. Find Cos B

Answer 1

Answer: 9 / 41

Explanation:

1) Definition of the function (ratio) cosine

cos (angle) = adjacent-leg / hypotenuse

2) Angle: B.

3) Adjacent-leg to angle B in the figure: segment BC = 27

4) Hypotenuse of the triangle in the figure: segment AB = 123

5) cos(B) = 27 / 123 = 9 / 41