Trigonometry (10th Edition)

Published by Pearson
ISBN 10: 0321671775
ISBN 13: 978-0-32167-177-6

Chapter 5 - Test - Page 244: 5a

Answer

$cos(270^{\circ}-x) = - sin~x$

Work Step by Step

$cos(270^{\circ}-x)$ $=cos(270^{\circ})~cos(x)+sin(270^{\circ})~sin(x)$ $=(0)~cos(x)+(-1)~sin(x)$ $= - sin~x$
Update this answer!

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

Update this answer

After 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.