How do you find the reference angle in degrees and radians 120 degrees?
1 Answer
The reference angle is the angle between the terminal arm of the angle and the x axis always larger than 0 degrees and smaller than 90 degrees.
Explanation:
Since 120 degrees is in quadrant 2, the reference angle, represented by
So, the reference angle is 60 degrees. To convert this to radians, we multiply by the ratio
Before we multiply, we can have the 180 eliminate the 60 and become a 3 in the denomiator.
This leaves us with
Practice exercises:
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Find the reference angle, in degrees and in radians, of 40 degrees.
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Find the reference angle, in degrees and in radians, of 335 degrees.
Good luck!