Answer
Alternative
Work Step by Step
When solving a triangle given 3 sides (SSS) we can use the Alternative Form of the Law of Cosines. This is because it solves for an angle.
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 8 - 8.2 - Law of Cosines - 8.2 Exercises - Page 573: 2
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