Precalculus Examples

$- 120 °$

Step 1

The complement of $- 120 °$ is the angle that when added to $- 120 °$ forms a right angle ( $90 °$ ).

$90 ° - (- 120)$

Step 2

Multiply $- 1$ by $- 120$ .

$90 + 120 °$

Step 3

Add $90$ and $120$ .

$210 °$