#### Answer

$1$

#### Work Step by Step

$0$ is a special angle that intersects the unit circle at the point $(1, 0)$.
Since $\cos{\theta}=x$, then
$\cos{0} =1$

Published by
Pearson

ISBN 10:
013421742X

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

$1$

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.