Precalculus Examples

$- 40$

Step 1

The complement of $- 40$ is the angle that when added to $- 40$ forms a right angle ( $90 °$ ).

$90 ° - (- 40)$

Step 2

Multiply $- 1$ by $- 40$ .

$90 + 40 °$

Step 3

Add $90$ and $40$ .

$130 °$