Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 4 - Section 4.7 - Inverse Trigonometric Functions - Exercise Set - Page 626: 32



Work Step by Step

Suppose $\theta =\cos^{-1}(0.57)$ This gives: $\cos \theta=\cos [\cos^{-1}(0.57)]$ The inverse property states that $\cos(\cos^{-1} a)=a $ satisfies for every $ a $ in the range $[-1,1]$ . Therefore, we have $ \cos [\cos^{-1}(0.57)]=0.57$
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.