Answer
$$-\frac{\pi }{4}$$
Work Step by Step
We simplify as follows:
$$\frac{-\frac{3 \pi }{4}+\frac{\pi }{4}}{2}=\frac{-\frac{2\pi }{4}}{2}=-\frac{\pi }{4}$$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 4 - Section 4.5 - Graphs of Sine and Cosine Functions - Exercise Set - Page 599: 124
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