Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 7 - Trigonometric Identities and Equations - Chapter 7 Test Prep - Review Exercises: 17

Answer

$17\rightarrow I$

Work Step by Step

$\cos \left( 210\right) =\cos \left( 150+60\right) =\cos 150\cos 60-\sin 150\sin 60$ $17\rightarrow I$
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.