1. Warm up Change angle to degrees Change angle to degrees, minutes and seconds.

2. - Exploring the Unit Circle (Second, Third, and Fourth Quadrants) Chapter 4 Understanding Trigonometric Functions Language Objectives: We will exploring coterminal angle and reference angle by use graph

3. Coterminal Angles-Are two angles in standard position with the same terminal side. For example 30°, –330° and 390° are all coterminal.

4. Find a positive and a negative angle coterminal with a 55° angle. Example 1:

5. Example 2:

6. Reference Angle-A reference angle of any angle, not on an axis, that is in standard position is the acute angle formed by the terminal side of the given angle and the x-axis.

7. Example:

8. Exit directions Do: With your classmate complete Additional Example Put: keep in your note book Finish By: 10.40 When done do: Complete Worksheet 11B