Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 6 - 6.1 - Angles and Their Measure - 6.1 Exercises - Page 430: 30


(a) $2°~30'$ (b) $-3°~34'~48''$

Work Step by Step

$1'=60''$ $1°=60'$ $1°=60'\times\frac{60''}{1'}=3600''$ (a) $2.5°=2°+0.5°·\frac{60'}{1°}=2°~30'$ (b) $-3.58°=-(3°+0.58°·\frac{60'}{1°})=-(3°~34.8')=-[3°~(34'+0.8'·\frac{60''}{1'})]=-3°~34'~48''$
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