Calculus (3rd Edition)

Published by W. H. Freeman
ISBN 10: 1464125260
ISBN 13: 978-1-46412-526-3

Chapter 13 - Vector Geometry - 13.4 The Cross Product - Preliminary Questions - Page 676: 2


The length of $ e\times f $ is $\frac{1}{2}$.

Work Step by Step

We have $$\|e\times f\|=\|e\|\|f\| \sin \frac{\pi}{6}=(1)(1)(\frac{1}{2})=\frac{1}{2}.$$ Hence, the length of $ e\times f $ is $\frac{1}{2}$.
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