1. Trigonometric Functions: The Unit Circle Section 4.2

2. Objectives I can draw and label a unit circle with key information

3. Unit Circle The unit circle is a circle of radius 1 with its center at the origin.

4. Using Special Triangles Let’s define key ordered pairs using special triangles 30°

5. Using Special Triangles Let’s define key ordered pairs using special triangles 45°

6. Using Special Triangles Let’s define key ordered pairs using special triangles 60°

7. These are Quadrant I key values! All other quadrants have same key values! x-values and y-values depend on quadrant.

8. Points on the Unit Circle

9. Homework Practice Unit Circle 1 min Quiz Next Class (Triangles)