Trigonometry (10th Edition)

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

Chapter 7 - Applications of Trigonometry and Vectors - Section 7.4 Vectors, Operations, and the Dot Product - 7.4 Exercises - Page 330: 45

Answer

$\langle -3.0642,2.5712 \rangle$

Work Step by Step

Using a calculator, $\textbf{u}=\langle 4\cos140^{\circ},4\sin140^{\circ} \rangle\approx\langle 4(-0.7660),4(0.6428) \rangle\approx\langle -3.0642,2.5712 \rangle$
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