#### Answer

$\frac{1}{5}$

#### Work Step by Step

-$ \cos (-\theta) = - \cos \theta= \frac{1}{5}$

Published by
Pearson

ISBN 10:
0321671775

ISBN 13:
978-0-32167-177-6

$\frac{1}{5}$

-$ \cos (-\theta) = - \cos \theta= \frac{1}{5}$

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