Answer
$θ=\frac{\pi}{12}=15°$
Work Step by Step
$r=\frac{1}{32}v_0^2~sin~2θ$
$v_0=80~ft/s$ and $r=100~ft$
$100=\frac{1}{32}(80)^2~sin~2θ$
$100=200~sin~2θ$
$\frac{1}{2}=sin~2θ$
$2θ=\frac{\pi}{6}=30°$
$θ=\frac{\pi}{12}=15°$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 7 - Review Exercises - Page 553: 79
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