Yes. Quadrantal angles have reference angles of either 0 degrees (e.g. 0 degrees and 180 degrees) or 90 degrees (e.g. 90 degrees and 270 degrees).
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A quadrantal angle is one whose initial arm is the positive x-axis and whose terminal arm is on the y-axis or the y-axis.In other words, it is k(90 degrees), k is an integer.(in radians: k(pi)/2)
Ah, let's create a happy little angle here. To find the reference angle for 550 degrees, we simply subtract 360 degrees from 550. So, 550 - 360 equals 190 degrees. That's your reference angle, a beautiful angle just waiting to bring some joy to your mathematical canvas.
A main angle of refrence.
360-331=2929 degrees is your reference angle. Remember your signs, though.
The angle of reference is in the first quadrant, and 90 degrees angle is not in the quadrant.