Question

In ΔABC, if C is a right angle, what is the measure of x?

Answer 1

x ≈ 72.3°

Explanation:

using the cosine ratio in the right triangle

cos x =
`(adjacent)/(hypotenuse)` =
`(AC)/(AB)` =
`(7)/(23)` , then

x =
`cos^(-1)` (
`(7)/(23)` ) ≈ 72.3° ( to the nearest tenth )