Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 6 - Trigonometric Functions - 6.1 Angles and Their Measure - 6.1 Assess Your Understanding - Page 362: 31



Work Step by Step

We know that $1^o = 60’$ $1’=60"$. Use a calculator and the conversion factors above to obtain: $18.255^{\circ}\\=18^{\circ}+0.255\cdot60'\\=18^{\circ}+15.3'\\=18^{\circ}+15'+0.3\cdot60''\\=18^{\circ}+15'+18''$.
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