Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 11 - For Thought and Discussion: 5

Answer

45 degrees

Work Step by Step

We know that the magnitude of the dot product uses $ cos \theta $, while the cross product uses $sin \theta$. These two expressions are only equivalent when theta is 45 or 225 degrees.
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