## Trigonometry (10th Edition)

Published by Pearson

# Chapter 1 - Trigonometric Functions - Section 1.3 Trigonometric Functions - 1.3 Exercises: 22

#### Answer

r is the hypotenuse of a right triangle formed by (x,y)

#### Work Step by Step

1. The distance formula $r=\sqrt {x^{2}+y^{2}}$. This looks a lot like Pythagorean theorem. If you think about it as Pythagorea theorem, you will see that r is length of hypotenuse of a triangle with legs x and y.

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.