Answer
$26.92\ in$
Work Step by Step
Draw a vertical line from top as shown in the figure, we have $cos(A)=\frac{42.36/2}{x}$, thus $x=\frac{21.18}{cos(38.12^\circ)}\approx26.92\ in$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 5 - Trigonometric Functions - 5.4 Solutions and Applications off Right Triangles - 5.4 Exercises - Page 548: 43
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