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Why is the reference angle the angle
the terminal side and the x-axis instead of the y-axis? ​

User Ovunccetin
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1 Answer

2 votes

Answer:

If necessary, first "unwind" the angle: Keep subtracting 360 from it until it is lies between 0 and 360°. (For negative angles add 360 instead).

Sketch the angle to see which quadrant it is in.

Depending on the quadrant, find the reference angle:

User Brighton
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