Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 5 - Section 5.5 - Inverse Trigonometric Functions and Their Graphs - 5.5 Exercises: 14

Answer

$1.11021rad$

Work Step by Step

$\cos ^{-1}\left( \dfrac {4}{9}\right) =1.110212\ldots \approx 1.11021rad$ (when corrected to five digit )
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.