Find the reference angle for the given angles.
The reference angle is the angle that the given angle makes with the x-axis.
Part a: 120 degree.
Step 1: Determine the quadrant of given angle.
120 is lies between angle 90 and 180 (second quadrant)
So, terminal side is in quadrant 3rd.
Step 2 : Determine the operation.
Subtract the angle from 180 degrees.
Part b: 230 degree.
Angle 230 is lies between 180 and 270.
So, terminal s...
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