Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Appendix A - Section A.1 - Introduction to Functions - A.1 Problem Set - Page 488: 62

Answer

Radius is a positive quantity so a radius of $-10$ cannot exist.

Work Step by Step

Radius must always be greater than zero, which means that a negative radius cannot exist. Since $A(-10)$ implies that the radius has a value of $-10$, this is not possible.
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