Hi, I need to.........
find the reference angle for an angle of 220 degrees.
Fine the reference angle for an angle of 5pi / 3
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If you imagine the unit circle a reference angle is the smallest angle difference between the given angle and the x-axis (which is at 0 or 180 degrees).
In the case of 220 it is closest to 180 so the reference angle is 40 degrees
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