Topic: Circular Functions
Subtopic: The Unit Circle
Overview
The unit circle developed in this section is probably the most widely useful item in all of trigonometry. It provides an easy way to know the trig functions of all the "nice" angles from 0° to 360°. It will be used throughout the rest of this class, calculus, and differential equations. Understand it, memorize it, use it!
Objectives
By the end of this topic you should know and be prepared to be tested on:
- 3.3.1 Know all angles in the unit circle (degrees and radians)
- 3.3.2 Know the all the (x,y) coordinates in the unit circle
- 3.3.3 Evaluate trig functions using the unit circle
- 3.3.4 Evaluate inverse trig functions using the unit circle
Terminology
Define: unit circle