Answer
$\text{reference}$
Work Step by Step
The acute angle formed by the terminal side of an angle $\theta$ in standard position and the horizontal axis is the $\underline{\text{reference}}$ angle of $\theta$ and is denoted by $\theta'$.
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 6 - 6.3 - Trigonometric Function of Any Angle - 6.3 Exercises - Page 453: 1
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