Answer
$y,x$.
Work Step by Step
As we can see on the image $x=\cos\theta$, $y=\sin\theta$, hence the answer is: $y,x$.
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 6 - Trigonometric Functions - 6.2 Trigonometric Functions: Unit Circle Approach - 6.2 Assess Your Understanding - Page 378: 11
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