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 - 6.2 The Unit Circle and Circular Functions - 6.2 Exercises - Page 587: 2

Answer

$1$

Work Step by Step

$0$ is a special angle that intersects the unit circle at the point $(1, 0)$. Since $\cos{\theta}=x$, then $\cos{0} =1$

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