1. Agenda Notes : (no handout, no calculator) –Reference Angles –Unit Circle –Coterminal Angles Go over test Go over homework Homework.

2. initial side: is always the positive x-axis terminal side Positive angles are measured counterclockwise. Negative angles are measured clockwise. Angles in standard position

3. Reference Angles Angle in standard position initial side terminal side

4. Reference Angles

7. Coterminal Angles Definition: Two angles with the same initial and terminal side

8. Coterminal Angles We can have infinitely many positive AND negative coterminal angles. For degrees, add 360° or subtract 360° For radians, add 2 π or subtract 2 π

9. Examples-Degrees

10. Examples-Radians

11. Homework Go over test Go over last night’s homework Pg 381:1,2,25-42all, 49-52all