Answer
$50~heartbeats~per~second$
Work Step by Step
$Frequency=\frac{b}{2\pi}=\frac{\frac{5\pi}{3}}{2\pi}=\frac{5}{6}~hertbeats~per~second$
$Frequency=\frac{5}{6}(60)=50~heartbeats~per~second$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 6 - 6.4 - Graphs of Sine and Cosine Functions - 6.4 Exercise - Page 466: 81b
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