# High School Math : Understanding Angles in the Unit Circle

## Example Questions

### Example Question #15 : Graphing The Sine And Cosine Functions

In the unit circle, what is the angle in radians that corresponds to the point (0, -1)?

Explanation:

On the unit circle, (0,-1) is the point that falls between the third and fourth quadrant.  This corresponds to .

### Example Question #1 : Understanding Angles In The Unit Circle

What is the reference angle for ?