# Chapter 1 - Trigonometric Functions - Section 1.1 Angles - 1.1 Exercises: 116

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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