Find the Reference Angle -120

Problem

−120

Solution

1. Find a coterminal angle between 0 and 360 by adding 360 to the given angle.

−120+360=240

2. Identify the quadrant where the angle 240 terminates. Since 180<240<270 the angle is in Quadrant III.

3. Apply the reference angle formula for Quadrant III, which is θ′=θ−180

θ′=240−180

4. Calculate the final value.

θ′=60

Final Answer

Reference Angle of −120=60

Want more problems? Check here!