Find the Reference Angle -312

$- 312$

Step 1

Find an angle that is positive, less than $360 °$ , and coterminal with $- 312 °$ .

Add $360 °$ to $- 312 °$ .

$- 312 ° + 360 °$

The resulting angle of $48 °$ is positive and coterminal with $- 312 °$ .

$48 °$

Step 2

Since $48 °$ is in the first quadrant, the reference angle is $48 °$ .

$48 °$