Trigonometry (10th Edition)

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

Chapter 1 - Trigonometric Functions - Section 1.4 Using the Definitions of the Trigonometric Functions - 1.4 Exercises: 2

Answer

$\frac{8}{5}$

Work Step by Step

1.Reciprocal identity $\sec\theta=\frac{1}{\cos\theta}$ 2. Substitute the cos value: $\sec\theta=\frac{1}{\frac{5}{8}}=\frac{8}{5}$
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