Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 5 - Trigonometric Functions - Section 5.2 Trigonometric Functions: Unit Circle Approach - 5.2 Assess Your Understanding - Page 403: 67


$\sec{21^o}\approx 1.07$

Work Step by Step

RECALL: $\sec{x} = \dfrac{1}{\cos{x}}$ Use a scientific calculator in degree mode. Round-off answer to two decimal places to obtain: $\sec{21^o} =\dfrac{1}{\cos{21^o}} \approx 1.07$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.