Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 5 - Section 5.2 - Trigonometric Functions of Real Numbers - 5.2 Exercises - Page 417: 40

Answer

Graphical approximation: $0.$28 Calculator: 0.283662185463

Work Step by Step

For a point on the unit circle, the x-coordinate is $=\cos t$ $\cos$5 : (see image below) Graphical approximation: $0.$28 Calculator: 0.283662185463
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