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This online calculator finds the reference angle to a trigonometric angle in standard position. The reference angle is defined as the acute angle between the terminal side of the given angle and the x axis. The given angle may be in degrees or radians.
How to use the calculator
1 - Enter the angle:
- in Degrees top input. example 745
- in Radians second input (decimal form): example 7.1
then press the button "enter" on the same row.
If you enter a quadrantal angles such as 90, -180, 0..., the answer is "quadrantal".
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