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Lines
Reading points and direction vectors off a line's vector equation in R^3, and reasoning about which of the two angles between intersecting lines to take.
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2 exercises
Exercise 3.1.6
Consider the following vector equation for a line in :
Find a new vector equation for the same line by doing the change of parameter .
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Exercise 3.1.15
When we computed the angle between two lines in Example 3.18, we calculated two different angles and took the smaller of the two. Show that one can get the same answer by taking the absolute value of the dot product, i.e., by solving
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Adapted from Matrix Theory and Linear Algebra © 2017–2026 Peter Selinger, Lyryx Learning, and Ken Kuttler. Licensed under CC BY 4.0. Source: Matrix Theory and Linear Algebra. Imported at revision d74bc3a.