#### Answer

$17\rightarrow I$

#### Work Step by Step

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

Published by
Pearson

ISBN 10:
013421742X

ISBN 13:
978-0-13421-742-0

$17\rightarrow I$

You can help us out by revising, improving and updating this answer.

Update this answerAfter 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.