OBJECTIVES: After studying this chapter, you will be able to

- Describe the applications of ratios and percentage
- Define the relationships between angles and sides in a right triangle
- Use trigonometric functions in finding angles and lengths in a geometric shape
- Explain the importance of measurement systems
- Define the principal units of measure in U.S. customary and metric systems
- Describe and determine the units of measure for most common entities in terms of the principal units of measure
- Convert units between imperial and metric systems for many common entities
- Extract formulas for calculating any variable from a relationship between several variables

New terms: Cosine, cotangent, sine, ...

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