Answer
$d=r(1-\cos \frac{\theta}{2})$
Work Step by Step
Step 1: $d$ is the difference between $r$ and $h$.
Step 2: $d=r-h$
Step 3: Since $h=r\cos \frac{\theta}{2}$,
$d=r-h=r-(r\cos \frac{\theta}{2})=r(1-\cos \frac{\theta}{2})$
Trigonometry (11th Edition) Clone
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
978-0-13-421743-7
ISBN 13:
978-0-13421-743-7
Chapter 3 - Radian Measure and the Unit Circle - Section 3.2 Applications of Radian Measure - 3.2 Exercises - Page 115: 75
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