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: 65

Answer

$\langle 8,-7 \rangle$

Work Step by Step

Step 1: $\textbf {u}+\textbf {v}-3\textbf {u}$ Step 2: $\langle -2,5 \rangle+\langle 4,3 \rangle-3\cdot\langle -2,5 \rangle$ Step 3: $\langle -2,5 \rangle+\langle 4,3 \rangle-\langle -6,15 \rangle$ Step 4: $\langle -2+4-(-6),5+3-15 \rangle$ Step 5: $\langle 8,-7 \rangle$
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