Answer
$-\frac{1}{2}$
Work Step by Step
$(f\cdot g)(\frac{3\pi}{4})=\sin{\frac{3\pi}{4}}\cdot\cos{\frac{3\pi}{4}}=\frac{\sqrt2}{2}\cdot-\frac{\sqrt2}{2}=-\frac{1}{2}$
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 380: 109
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