Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 2 - Section 2.2 - Calculators and Trigonometric Functions of an Acute Angle - 2.2 Problem Set: 42


$\sec 71.8^{\circ}$ = 3.2017

Work Step by Step

Using calculator in degree mode- $\sec 71.8^{\circ}$ = 3.2016913279 (Finding $\cos$ first and then using reciprocal $\frac{1}{x}$) Rounding it to four places past the decimal point- $\sec 71.8^{\circ}$ = 3.2017
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