Question

if you are given the opposite side and hypotenuse, which trig function should you use?
cosine
sine
tangent

Explanation:

Step1: Recall trigonometric function definitions

In a right - triangle, $\sin\theta=\frac{\text{opposite}}{\text{hypotenuse}}$, $\cos\theta=\frac{\text{adjacent}}{\text{hypotenuse}}$, $\tan\theta=\frac{\text{opposite}}{\text{adjacent}}$.

Step2: Match the given sides with the formula

Since we are given the opposite side and the hypotenuse, we use the sine function.

Answer:

sine