Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 6 - The Circular Functions and Their Graphs - 6.1 Radian Measures - 6.1 Exercises - Page 572: 1

Answer

$radius$

Work Step by Step

Recall that an angle in radian is defined as $\theta=\frac{s}{r}$ where $s$ is the arc length and $r$ is the radius of the circle. For $\theta=1\ rad$, we have $s=r$, thus the answer is $radius$.
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