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: 120


180$^{\circ}$ between 2nd and 3rd quadrant.

Work Step by Step

1. It is the same case as in 115 exercise. 180$^{\circ}$ cannot be in either quadrant. 180$^{\circ}$+360$^{\circ}$= 540$^{\circ}$ 180$^{\circ}$-360$^{\circ}$=-180$^{\circ}$ Co-terminal angles always in the same quadrant as original angle.
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