Answer
$2.5,3.75$.
Work Step by Step
Using figure $13$, the value on the circle corresponding to the x-value of $-0.8$ are approximately $2.5,3.75$.
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 3.3 - Definition III: Circular Functions - 3.3 Problem Set - Page 145: 61
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