Find the Reference Angle 660

$660$

Step 1

Find an angle that is positive, less than $360 °$ , and coterminal with $660 °$ .

Subtract $360 °$ from $660 °$ .

$660 ° - 360 °$

The resulting angle of $300 °$ is positive, less than $360 °$ , and coterminal with $660 °$ .

$300 °$

Step 2

Since the angle $300 °$ is in the fourth quadrant, subtract $300 °$ from $360 °$ .

$360 ° - 300 °$

Step 3

Subtract $300$ from $360$ .

$60 °$