Algebra and Trigonometry 10th Edition

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

Chapter 8 - Review Exercises - Page 617: 65


$v=-4i+4\sqrt 3j=⟨-4,4\sqrt 3⟩$

Work Step by Step

$v=||v||(cos~θ)i+||v||(sin~θ)j$ $v=8(cos~120°)i+8(sin~120°)j$ $v=8(-\frac{1}{2})i+8(\frac{\sqrt 3}{2})j=-4i+4\sqrt 3j$
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