CHAPTER 3, SECTION A:

ALGEBRAIC RELATIONS AMONG THE DIFFERENT TRIG FUNCTIONS

- the idea and geometrical meaning of angles and angular measure (reviewable by reading (or re-reading) the various sections of Chapter 1 of the course, which can be accessed by clicking HERE), and
- the basic geometrical definitions of all six trig functions as the ratios of sides of the appropriate right angle triangles, phrased in terms of the concepts "hypoteneuse", "adjacent" and "opposite" (reviewable by reading (or re-reading) Section (c) of Chapter 2 of the course)

*This section of Chapter 3 shows how the basic geometric definitions
of the six trig functions as ratios of sides of a right-angle triangle
lead to algebraic inter-relations among the different trig functions
of the same angle.*

A list of the background material needed to follow the contents of this section is given below. If you are unfamiliar with one of the background topics, or feel you would like to quickly review it, click on the relevant link.

**If you are already familiar with all of the background
topics, you can proceed
directly to the contents of the current section of the course by clicking
HERE.
**

**BACKGROUND MATERIAL (AND LINKS):**

*
For this section of the course, you should be familiar with
*