Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 8 - 8.3 - Vectors in the Plane - 8.3 Exercises - Page 588: 101


The magnitude is $1$.

Work Step by Step

Our aim is to show the magnitude is $1$. Therefore, $\sqrt {(\cos\theta)^2+(\sin \theta)^2}=\sqrt 1=1$ This means that it is always a unit vector for any value of $\theta$. Q.E.D.
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.