Answer
For triangle ABC with sides a, b, and c the law of cosines states $c^{2} = a^{2} + b^{2} - 2ab \times cosC$
Work Step by Step
definition of law of cosines
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 6 - Section 6.6 - The Law of Cosines - 6.6 Exercises - Page 520: 1
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