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: 28

Answer

22.5$^{\circ}$

Work Step by Step

1. 360$^{\circ}$/12 = 30$^{\circ}$ degrees in one hour 2. At 9:45 the minute and hour hand are very close. A minute hand is on 9. An hour hand is already 45/60 passed from 9 to 10 hour. Therefore (3/4)$\times$30$^{\circ}$ = 22.5 $^{\circ}$
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