## Trigonometry (10th Edition)

Published by Pearson

# Chapter 1 - Trigonometric Functions - Section 1.3 Trigonometric Functions - 1.3 Exercises: 36

positive

#### Work Step by Step

1. r is always positive, because of square root 2. Let's consider quadrants and sign of (x,y) coordinates $quadrant (x,y):$ $Quad I$ $(+,+)$ $Quad II$ $(-,+)$ $Quad III$ $(-,-)$ $Quad IV$ $(+,-)$ 3.In Q3 y is negative and x is negative , so $\frac{x}{y}$ is positive

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