Trigonometry (10th Edition)

Published by Pearson
ISBN 10: 0321671775
ISBN 13: 978-0-32167-177-6

Chapter 2 - Acute Angles and Right Triangles - Section 2.3 Finding Trigonometric Function Values Using a Calculator - 2.3 Exercises: 7

Answer

$\sec$ 13$^{\circ}$ 15' = 1.02734878

Work Step by Step

$\sec$ 13$^{\circ}$ 15' First, convert to a fraction $\sec$ 13$^{\circ}$ $\frac{15}{60}$ Convert the fraction to a decimal $\frac{15}{60}$ = 0.25 Therefore: $\sec$ 13$^{\circ}$ 15' = $\sec$ 13.25$^{\circ}$ $\sec$ 13.25$^{\circ}$ = $\frac{1}{\cos13.25}$ $\frac{1}{\cos13.25}$ = 1.02734878 $\sec$ 13$^{\circ}$ 15' = 1.02734878
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