Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 13, Trigonometric Ratios and Functions - 13.3 Evaluate Trigonometric Functions of Any Angle - 13.3 Exercises - Skill Practice - Page 871: 24


See below

Work Step by Step

Since $\cos(180-theta)=-\cos \theta$ we obtain $\cos(180-135)=-\cos 135\\\cos 45=-\cos 135\\-\cos 45=\cos 135\\\cos 135=-\frac{\sqrt 2}{2}$ Now find $\sec135=\frac{1}{\cos 135}=\frac{1}{-\frac{\sqrt 2}{2}}=-\frac{2}{\sqrt 2}=-\sqrt 2$
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.