Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 6 - The Circular Functions and Their Graphs - 6.2 The Unit Circle and Circular Functions - 6.2 Exercises: 52

Answer

$\color{blue}{\sin{3.2} \approx -1}$

Work Step by Step

To approximate the value of $\cos{3.2}$, look for the x-value of the point where the terminal side o the angle 3.2 radians crosses the unit circle. Notice that for the given angle, the x-value of the point described above is around $-1$. Thus, $\color{blue}{\sin{3.2} \approx -1}$
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