Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Appendix A - Review - A.10 Internal Notation; Solving Inequalities - A.10 Assess Your Understanding - Page A87: 26


$(-2,0)$ See the figure below.

Work Step by Step

Since both the left and right boundaries of the given inequality involve "less than", then the interval notation will have parentheses on both ends. Hence, the given inequality can be written as $(-2,0)$. To graph, plot circles at $x=-2$ and $x=0$, then shade the region between them. See the figure below.
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