Trigonometry (10th Edition)

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

Chapter 1 - Trigonometric Functions - Section 1.1 Angles - 1.1 Exercises: 47



Work Step by Step

1. Redistribute a degree from the 90 and change it to 60 minutes. Then change one of minutes to 60 seconds. $89^{\circ}59'60"- 72^{\circ}58'11" = ?$ 2. Subtract separately then combine $89^{\circ}-72^{\circ}=17^{\circ}$ $59'-58'=01'$ $60"-11"=49"$ $17^{\circ}01'49"$
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