## Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole

# Chapter 11 - Section 11.3 - The Tangent Ratio and Other Ratios - Exercises - Page 512: 33a

#### Answer

The identity tan α = $\frac{sin α}{cos α}$ is valid

#### Work Step by Step

tan α = $\frac{a}{b}$ $\frac{sin α}{cos α}$= $\frac{\frac{a}{c}}{\frac{b}{c}}$= $\frac{a}{b}$

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