All High School Math Resources
Example Question #1 : Understanding Angles In The Unit Circle
In the unit circle, what is the angle in radians that corresponds to the point (0, -1)?
On the unit circle, (0,-1) is the point that falls between the third and fourth quadrant. This corresponds to .
Example Question #21 : Graphs And Inverses Of Trigonometric Functions
What is the reference angle for ?
To find the reference angle, subtract (1 trip around the unit circle) from the given angle until you reach an angle which is less than .