Trigonometry (11th Edition) Clone

Published by Pearson
ISBN 10: 978-0-13-421743-7
ISBN 13: 978-0-13421-743-7

Chapter 1 - Trigonometric Functions - Section 1.1 Angles - 1.1 Exercises - Page 9: 110


C and D

Work Step by Step

1. To find correct answers we need to ask ourselves. Are we adding or subtracting 360$^{\circ}$? Then if answer is yes, then the answer is incorrect 2. A. 360$^{\circ}$+r$^{\circ}$ and B. r$^{\circ}$-360$^{\circ}$ a Are coterminal angles, therefore incorrect. 3. C. 360-r$^{\circ}$ not coterminal ,therefor C is correct. Let's consider angle r= 90$^{\circ}$, then the expression will be equal to 270 which is not coterminal angle of 90$^{\circ}$ 4. D. r$^{\circ}$ + 180 definitely not a coterminal, and therefore it is correct. 5. C and D correct
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