1. Objective: Use unit circle to define trigonometric functions. Even and odd trig functions. Warm up 1.Find and. 2.Give the center and radius of a circle. a. b.

2. Unit Circle Center: Radius:

3. Example 1 Find the value of the trig functions at angle t. Given that the terminal side of t on the unit circle is at P Example 2 Find sin t, cost t, tan t. Terminal side of t coordinates P

5. Example 3 Use the unit circle to find: a. b. c. d. e. f. g. h.

6. Unit circle: Where are those values coming from?

7. Assignment: pg 486 #5-18