### Home > A2C > Chapter 8 > Lesson 8.2.1 > Problem8-121

8-121.

Evaluate each of the following expressions exactly.

Draw a unit circle and locate each angle. Draw a reference triangle. Use special triangles.

1. $\operatorname { tan } \frac { 2 \pi } { 3 }$

$-\sqrt{3}$

2. $\operatorname { tan } \frac { 7 \pi } { 6 }$

$\frac{\sqrt{3}}{3}$