Trigonometry (11th Edition) Clone

Published by Pearson
ISBN 10: 978-0-13-421743-7
ISBN 13: 978-0-13421-743-7

Chapter 5 - Review Exercises - Page 248: 26


26 is matched with B. $$\cos(-55^\circ)=\cos55^\circ$$

Work Step by Step

$$\cos(-55^\circ)$$ - Negative Angle Identities: $\cos(-\theta)=\cos\theta$ Therefore, $\cos(-55^\circ)=\cos55^\circ$ This corresponds to choice B. So we match 26 with B.
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