Answer
$3\sqrt 5\approx6.71$
Work Step by Step
Based on the two given points, we have the distance
$d=\sqrt {(-1-2)^2+(-7-(-1))^2}=3\sqrt 5\approx6.71$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 7 - Applications of Trigonometric Functions - Section 7.2 The Law of Sines - 7.2 Assess Your Understanding - Page 555: 67
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