Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 5 - Section 5.1 - The Unit Circle - 5.1 Exercises - Page 408: 35

Answer

$(-\frac{\sqrt 2}{2}, -\frac{\sqrt 2}{2})$

Work Step by Step

Because of the '-' in front of $\frac{3\pi}{4}$, you need to go counter-clockwise on the unit circle in the same distance, which gives you $\frac{5\pi}{4}$, which has the terminal point: $(-\frac{\sqrt 2}{2}, -\frac{\sqrt 2}{2})$
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