Answer
a) Reference b) x-axis
Work Step by Step
For an angle $\theta$ in standard position, the Reference angle is the positive acute angle between the terminal side of $\theta$ and the x-axis.
Trigonometry 7th Edition
by McKeague, Charles P.; Turner, Mark D.
Published by
Cengage Learning
ISBN 10:
1111826854
ISBN 13:
978-1-11182-685-7
Chapter 3 - Section 3.1 - Reference Angle - 3.1 Problem Set - Page 121: 1
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