Answer
$\dfrac{13\pi}{180} \ rad $
Work Step by Step
In order to convert the value from degrees to radians, we multiply by $\dfrac{π}{180^{\circ}}$.
Therefore
$13^{\circ}=(13) \times \dfrac{\pi}{180}\text{radians} \\=\dfrac{13\pi}{180} \ rad $
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 5 - Trigonometric Functions - Chapter Test - Page 460: 3
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