Make up blon #1

Okay so I guess i'm going to talk about what is going on in chapter 8-4. So, here goes.
I really think that I got most of this chapter.

IDENTITIES AND EQUATIONS
rules to simplify: 1. identities, 2. algebra, 3. identities.

Pretty much all this section is, is knowing your identities.

secθ=1/cosθ
cscθ=1/sinθ
cotθ=1/tanθ OR sinθ/cosθ


^^I think these three are you most important, besideds *polynomial _*

So pretty much, what you do is---

(tanA)(cotA)
(sinA/cosA)(cosA/sinA)
sinAcosA/sinAcosA=1


What I don't really understand in chapter 8 is graphing. If anyone really knows it, that would help a lot.