Answer
Law of cosines
Work Step by Step
In part (a) of the question, we came to the conclusion that SAS is given.
The first step is to use the law of cosines to find the third side of the triangle.
Trigonometry (10th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671775
ISBN 13:
978-0-32167-177-6
Chapter 7 - Applications of Trigonometry and Vectors - Section 7.3 The Law of Cosines - 7.3 Exercises - Page 313: 1b
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