Answer
makes sense
Work Step by Step
This statement makes sense because in a right triangle, the cosine of 90-degrees is zero and the third term in the Law of Cosines will disappear and leave the formula of the Pythagorean Theorem.
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
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: 63
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