Question

when computing sine, you do adjacent
when computing cosine, you do /hypotenuse.
when computing tangent, you do /adjacent.
check

Explanation:

Step1: Recall trigonometric ratios

The sine of an angle in a right - triangle is defined as \(\sin\theta=\frac{\text{opposite}}{\text{hypotenuse}}\).

Step2: Recall cosine ratio

The cosine of an angle in a right - triangle is defined as \(\cos\theta=\frac{\text{adjacent}}{\text{hypotenuse}}\).

Step3: Recall tangent ratio

The tangent of an angle in a right - triangle is defined as \(\tan\theta=\frac{\text{opposite}}{\text{adjacent}}\).

Answer:

First blank: opposite/hypotenuse; Second blank: adjacent; Third blank: opposite