Question

Find the value of x. Round to the nearest tenth

Answer 1

16.2

Explanation:

A trick to remember for right triangles is SOH-CAH-TOA:

Sine = Opposite / Hypotenuse

Cosine = Adjacent / Hypotenuse

Tangent = Opposite / Adjacent

Here, we have the side adjacent to the angle and the hypotenuse. So we should use cosine.

cos 22° = 15 / x

x = 15 / cos 22°

x ≈ 16.2