Answer
$d=10sec(x)$
Work Step by Step
Step 1. Based on the given conditions, we have $cos(x)=\frac{10}{d}$ which gives $d=10sec(x)$
Step 3. We can graph the function for $-\frac{\pi}{2}\lt x\lt \frac{\pi}{2}$ as shown in the figure.
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 4 - Section 4.6 - Graphs of Other Trigonometric Functions - Exercise Set - Page 611: 61
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