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There are some instances when an abbreviated form of the distance formula can be used. What is the abbreviated formula and under what conditions can it be used?

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter6: The Trigonometric Functions

Section6.1: Angles

Problem 21E

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There are some instances when an abbreviated form of the distance formula can be used. What is the abbreviated formula and under what conditions can it be used?

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