Answer
$\frac{5\pi}{4}\ rad$
Work Step by Step
Use the conversion factor $1^\circ=\frac{\pi}{180^\circ}\ rad$, we have $225^\circ=225^\circ\times\frac{\pi}{180^\circ}=\frac{5\pi}{4}\ rad$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 6 - The Circular Functions and Their Graphs - Quiz - Page 616: 1
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