Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 6 - Review Exercises - Page 798: 17


$30.5\ ft$

Work Step by Step

The roof sides and ground form an isosceles triangle. Assume the side length is $x$ feet; we have $2x\ cos55=35$ which gives $x=\frac{35}{2cos55}\approx30.5\ ft$. You can also use the Laws of Sines for this problem by finding the third angle first.
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