Answer
$-135^{\circ}$
Work Step by Step
Recall that $2\pi\text{ radians}=360^\circ$, hence $1 \text{ radian} = \dfrac{180^\circ}{\pi}$.
Therefore:
$\dfrac{-3\pi}{4}=\dfrac{-3\pi}{4}\cdot\dfrac{180^\circ}{\pi}=-135^{\circ}$
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 - 6.1 Angles and Their Measure - 6.1 Assess Your Understanding - Page 362: 58
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