For Exercises 17 and 18, find the acute angle between the given lines by using vectors parallel to the lines. 17. y = x, y = 2x + 3 18. 2 - x + 2y = 0, 3x - 4y =-12

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter1: Vectors
Section1.3: Lines And Planes
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For Exercises 17 and 18, find the acute angle between the given lines by using vectors parallel to the lines. 17. y = x, y = 2x + 3 18. 2 - x + 2y = 0, 3x - 4y =-12

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