1. The Unit Circle and Circular Functions Trigonometry Section 3.3

2. The Unit Circle

3. Circular Functions

4. Understanding the unit circle… π6π6

5. π4π4

6. π3π3

7. Complete the Unit Circle

8. Example 1 Find the exact values of Sin (-3π) Cos (-3π) Tan (-3π)

9. Example 2 Use the unit circle to find the exact values.

10. Example 3 Find a calculator approximation for each circular function value. A) sin 3.42 B) tan.8234 C) sec 5.6041 D) csc (-2.7335)

11. Example 4 Approximate the value of s in the interval [0, ] if sin s =.3210 Find the exact value of s in the interval [, 2π] if tan s = -

12. Practice