1. Cut out a large circle.

2. Fold the circle in half to get one diameter. (Fold 1)

3. Fold the circle in half again to get another diameter (Fold 2).

4. Draw in the x- and y-axis. Label the radius as 1 unit. Label the points and their radians.

5. Refold the circle to position of Fold 2. Fold the quarter circle again in half. Draw in this lines.

6. Label these new points:   

Identify them as radians also.

7. Refold the circle to position of Fold 2. Fold the quarter circle into thirds.

8. Draw in these 4 lines. Label these new points

Identify them as  radians also.

9. Recall that the coordinate of each endpoint on the unit circle is (cos A, sin A). Use this unit circle to help you recall the values in the table for Trigonometric Values.

This page was last modified on 01/06/07
 

© Rahn, 2000