Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 7 - Test: 26

Answer

$-8$

Work Step by Step

Since $\textbf {v}=\langle -4,1 \rangle$ and $\textbf {w}=\langle 1,-4 \rangle$, ${\textbf {v}\cdot\textbf {w}}=-4(1)+1(-4)=-4-4=-8$.
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