Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 6 - Section 6.2 - The Law of Cosines - Exercise Set - Page 732: 55

Answer

See explanations.

Work Step by Step

Given an $SAS$ situation, use the Law of Cosines to find the third side and then use the Law of Sines to solve the larger unknown angle. The third angle can be calculated using the fact that the sum of all angles is $180^\circ$.
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