Reference Angle and Quadrant Calculator
This online calculator finds the reference angle and the quadrant of a trigonometric a 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.
Use of Reference Angle and Quadrant Calculator
1  Enter the angle:
 in Degrees top input. (example 745)
 in Radians second input. (example 12/5 ?)
then press the button "Calculate" on the same row.
If you enter a quadrantal angles such as 90, 180, 0..., the message "This is a quadrantal angle" will be displayed.
More References and links
 Find Reference Angle.

Questions on Angles in Standard Position.

Angle in Standard Position.

Trigonometry Angle Questions With Answers.

Maths Calculators and Solvers.