Answer
$98.5^o$
Work Step by Step
Using the relation $s=r\theta$, we have $\theta=\frac{s}{r}$; that is
$$
\theta=\frac{s}{r}= \frac{0.860}{0.5}=1.72\ rad=1.72\times\frac{180}{\pi}=98.5^o
.$$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 12 - Section 12.6 - Radian Measure - Exercise - Page 418: 21
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