# Chapter 4

## Factoring and More Trigonometry

### Section 4.1

Section 4.1

**You will develop a method to change a quadratic expression written as a sum into its product form, also called its factored form. Then you will identify patterns for factoring quadratic expressions.**

- 4.1.1 Introduction to Factoring Expressions (426)
- 4.1.2 Factoring with Area Models (434)
- 4.1.3 Factoring More Quadratics (443)
- 4.1.4 Factoring Completely (449)
- 4.1.5 Factoring Special Cases (457)

### Section 4.2

Section 4.2

**You will extend your understanding of trigonometric ratios to include sine, cosine, and inverse trigonometric functions, and you will use these tools to solve for missing measurements in right triangles. You will model situations with right triangles and use trigonometric ratios to solve problems.**

- 4.2.1 Sine and Cosine Ratios (463)
- 4.2.2 Selecting a Trig Tool (470)
- 4.2.3 Inverse Trigonometry (479)
- 4.2.4 Trigonometric Applications (485)