Precalculus (6th Edition)

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

Chapter 7 - Trigonometric Identities and Equations - 7.6 Trigonometric Equations - 7.6 Exercises: 15

Answer

$\frac{3\pi}{4}$, $\frac{7\pi}{4}$

Work Step by Step

$2\cot x+1=-1$ $2\cot x=-2$ $\cot x=-1$ The only solutions in $[0, 2\pi)$ are $\frac{3\pi}{4}$ and $\frac{7\pi}{4}$.
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