Download Chapter 4 Understanding Trigonometric Functions

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Chapter 4
Understanding Trigonometric
Functions
- Exploring the Unit Circle
(Second, Third, and Fourth
Quadrants)
Language Objectives: We will exploring coterminal angle and
reference angle by use graph
Coterminal
Angles-Are two angles in standard position with the same terminal side.
For example 30°, –330° and 390° are all coterminal.
Example 1:
Find a positive and a negative angle coterminal with a 55° angle.
Example 2:
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.
Example:
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