Question

A triangle has a hypotenuse of 14 inches. Angle A is equal to

72 degrees.
Find the length of the adjacent side. Round the solution to the
nearest hundredth.

Answer 1

b = 4.33 in

Explanation:

angle A = 72°

hypotenuse = 14 in

Required: Adjacent side length (b)

use the formula Cos A = adjacent / hypotenuse

cos (72) = b / 14

b = cos (75) * 14

b = 4.33 in