Answer
$AB\approx2.30$ mi
Work Step by Step
Using the law of cosines:
$AB=\sqrt{2.82^2+3.56^2-2(2.82)(3.56)\cdot $cos$(40.3º)}$
$AB=\sqrt{7.9524+12.6736-20.0784\cdot 0.7627}$
$AB=\sqrt{20.626-15.3138}$
$AB=\sqrt{5.312}$
$AB\approx2.30$ mi
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 522: 39
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