Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 7 - Analytic Trigonometry - Chapter Review - Chapter Test - Page 507: 8

Answer

$\approx0.77.$

Work Step by Step

I know that $\sec{x}=\frac{1}{\cos{x}}$, hence $\sec^{-1}{x}=\cos^{-1}{\frac{1}{{x}}}$. I use a calculator in RAD mode and then round the result, hence: $\sec^{-1}{(1.4)}=0.7752\approx0.77.$
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.