Question

Use ABC to find the value of cos A

Answer 1

A = 16.3

Explanation:

take angle A as reference angle

using cos rule

cos A =adjacent /hypotenuse

cos A =24/25

cos A = 0.96

A =
`cos^(-1) (0.96)`

A = 16.26

A = 16.3 (after converting to nearest tenth)

Answer 2

Cos A = 24/25

Explanation:

cos A = adj side / hypotenuse

Cos A = 24/25