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 - Page 36: 8

Answer

$-\frac{7}{11}$

Work Step by Step

1.Reciprocal identity $\cos\theta=\frac{1}{\sec\theta}$ 2. Substitute the given value: $\cos\theta=\frac{1}{-\frac{11}{7}}=-\frac{7}{11}$
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