Answer
$AC = 20$, $AB = 26.9$
Work Step by Step
$tan (42) = 18/AC$
$.9 = 18/AC$
$.9*AC/.9 = 18/AC *AC/.9$
$AC = 18/.9$
$AC = 20$
$AC^2 + BC^2 = AB^2$
$20^2 + 18^2 = AB^2$
$400 + 324 = AB^2$
$724 = AB^2$
$\sqrt {724} = \sqrt {AB}$
$ 26.9 = AB$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 10 - Radical Expressions and Equations - Chapter Review - 10-6 Trigonometric Ratios - Page 644: 58
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