Trigonometry (10th Edition)

Published by Pearson
ISBN 10: 0321671775
ISBN 13: 978-0-32167-177-6

Chapter 5 - Trigonometric Identities - Section 5.1 Fundamental Identities - 5.1 Exercises - Page 196: 92

Answer

The students will enjoy graphing the cosine and secant functions because the graphs of $\cos{x}$ and $\cos{(-x)}$, as well as the graphs of $\sec{x}$ and $\sec{(-x)}$, are the same.

Work Step by Step

Students who seem to ignore negative signs will enjoy graphing functions involving cosine and secant functions because the graphs of $\cos{x}$ and $\cos{(-x)}$ are identical or the same, while the graphs of $\sec{x}$ and $\sec{(-x)}$ are also identical or the same.
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