Answer
(a)45°
(b)90°
(c)75°
Work Step by Step
(a)225°-180°=45°
(b)810°-2(360°)=90°
(c)-105°+180°=75°
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 6 - Section 6.3 - Trigonometric Functions of Angles - 6.3 Exercises - Page 498: 7
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