Functions Modeling Change: A Preparation for Calculus, 5th Edition

Published by Wiley
ISBN 10: 1118583191
ISBN 13: 978-1-11858-319-7

Chapter 7 - Trigonometry and Periodic Functions - Strengthen Your Understanding - Page 321: 70

Answer

False

Work Step by Step

Two angles have the same cosine value if their x-value on the unit circle is the same, while two angles have the same sine value if their y-value on the unit circle is the same. Thus, this statement is false, for angles can have the same cosine value and not the same sine value.
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