### Home > PC > Chapter 1 > Lesson 1.1.1 > Problem1-12

1-12.

For $∆ABC$ below, state each ratio in terms of the sides.

1. $\sin(α) = \text{ ?}$

2. $\cos(α) = \text{ ?}$

3. $\tan(α) = \text{ ?}$

Label the sides.

$\sin(\alpha)=\frac{\text{opposite}}{\text{hypotenuse}}$

$\cos(\alpha)=\frac{\text{adjacent}}{\text{hypotenuse}}$

$\tan(\alpha)=\frac{\text{opposite}}{\text{adjacent}}$