Answer
$c^2=a^2+b^2-2ab\cdot cos(C)$, $b^2=a^2+c^2-2ac\cdot cos(B)$, $a^2=b^2+c^2-2bc\cdot cos(A)$.
Work Step by Step
$c^2=a^2+b^2-2ab\cdot cos(C)$, $b^2=a^2+c^2-2ac\cdot cos(B)$, $a^2=b^2+c^2-2bc\cdot cos(A)$.
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 9 - Polar Coordinates; Vectors - 9.4 Vectors - 9.4 Assess Your Understanding - Page 609: 101
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