Trigonometry 7th Edition

by McKeague, Charles P.; Turner, Mark D.

Published by Cengage Learning

ISBN 10: 1111826854

ISBN 13: 978-1-11182-685-7

Chapter 4 - Section 4.4 - The Other Trigonometric Functions - 4.4 Problem Set - Page 229: 69

Answer

$–0.8391$

Work Step by Step

$\cos 10$ Angle 10 here is given in radians So we need set the mode to take angle in radians while using calculator Value upto four decimal places = $–0.8391$

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