Trigonometry (10th Edition)

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

Chapter 2 - Acute Angles and Right Triangles - Section 2.1 Trigonometric Functions of Acute Angles - 2.1 Exercises - Page 51: 8

Answer

$\sec 60^{\circ} = \frac{1}{\cos60^{\circ}} $` $ \frac{1}{\cos60^{\circ}} = \frac{1}{\frac{1}{1}} = 2$

Work Step by Step

$\sec 60^{\circ} = \frac{1}{\cos60^{\circ}} $` (using inverse property) $ \frac{1}{\cos60^{\circ}} = \frac{1}{\frac{1}{1}} = 2$ (using substitution property)
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