Question

Which equation can be solved to find one of the missing side lengths in the triangle?aB60512 unitsАCOS(60°) =22 믕cos(60°) = 12SubmitNex응Save and Exitcos(609) =0=1or this and return

Answer 1

In a right rectangle, we have:

$\sin \alpha=\frac{opposite}{hypotenuse}$$\cos \alpha=\frac{\text{adjacent}}{hypotenuse}$

For your exercice, hypotenuse=12

The exercise also inform the angle 60°, then:

$\sin \text{ 60}=\frac{\text{opposite}}{\text{hypotenuse}}=\frac{b}{12}$$\cos 60=\frac{adjacent}{\text{hypotenuse}}=\frac{a}{12}$