#### Answer

$a^{2}$=$b^{2}$+$c^{2}$-2bc cos a

#### Work Step by Step

We have to consider the other two sides (b and c) and the opposite angle (a).

Chegg costs money, GradeSaver solutions are free!

Published by
Cengage

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

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

$a^{2}$=$b^{2}$+$c^{2}$-2bc cos a

We have to consider the other two sides (b and c) and the opposite angle (a).

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.