Precalculus (6th Edition) Blitzer

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

Chapter 4 - Section 4.3 - Right Triangle Trigonometry - Exercise Set - Page 563: 73


The statement makes sense.

Work Step by Step

Let us suppose $\theta $ to be the angle of elevation, h to be the height of the arch and $r$ to be the radius. Apply the tangent ratio to get $\begin{align} & \tan \theta =\frac{h}{r} \\ & h=r\tan \theta \end{align}$ Thus, the above statement provided is sufficient to find the height of the arch.
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