Answer
See figure.
Work Step by Step
We draw $45°$ in standard position. The terminal side is along the line $y=x$ in quadrant I.
Here are examples of some points that satisfy this equation:
$(1,1), (3,3), (\sqrt5,\sqrt5), (15,15)$ etc.
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 2 - Section 2.1 - Definition II: Right Triangle Trigonometry - 2.1 Problem Set - Page 63: 76
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