Respuesta :

MathPhys

Answer:

16.2

Step-by-step 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

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