Trigonometry (11th Edition) Clone

Published by Pearson
ISBN 10: 978-0-13-421743-7
ISBN 13: 978-0-13421-743-7

Chapter 2 - Review Exercises - Page 94: 34



Work Step by Step

Step 1: Using the reciprocal identity $\sec\theta=\frac{1}{\cos\theta}$, we write $\sec \theta=1.2637891$ as $\frac{1}{\cos\theta}=1.2637891$ Step 2: Using cross-multiplication, $\frac{1}{\cos\theta}=\frac{1.2637891}{1}$ is written as $\cos\theta=\frac{1}{1.2637891}$ Step 3: Writing $\cos\theta=\frac{1}{1.2637891}$ as $\theta=\cos^{-1} \frac{1}{1.2637891}$ Step 4: Using degree mode, we type $\cos^{-1} \frac{1}{1.2637891}$ into the calculator and solve: $\theta=\cos^{-1} \frac{1}{1.2637891}=37.695528^{\circ}$
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.