#### Answer

The identity sec α = $\frac{1}{cos α}$ is valid

#### Work Step by Step

sec α = $\frac{c}{b}$
cos α = $\frac{b}{c}$
$\frac{1}{cos α}$ = $\frac{1}{\frac{b}{c}}$ = $\frac{c}{b}$
So sec α and $\frac{1}{cos α}$ are equivalent

Published by
Cengage

ISBN 10:
978-1-337-61408-5

ISBN 13:
978-1-33761-408-5

The identity sec α = $\frac{1}{cos α}$ is valid

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.