Answer
$$ v . e= -\frac{3}{2} .$$
Work Step by Step
We have
$$ v . e=\|v\|\|e\| \cos \theta=3(1)\cos \frac{2\pi}{3}=-\frac{3}{2} .$$
Calculus (3rd Edition)
by Rogawski, Jon; Adams, Colin
Published by
W. H. Freeman
ISBN 10:
1464125260
ISBN 13:
978-1-46412-526-3
Chapter 13 - Vector Geometry - 13.3 Dot Product and the Angle Between Two Vectors - Exercises - Page 666: 33
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