Problem 23. Consider the plane P in R³ defined by the equation x+2y+3z = 0 and the line L in R³ spanned [9] by the vector 3 Let S R³ R³ denote the reflection through the plane P: it takes a vector in R³ and transforms it into its mirror image, the mirror being the plane P. Let T : R3 → R³ denote the 90° rotation around L of your choice (i.e. you can choose if the rotation is clockwise or counterclockwise). Both S and T are linear transformations (you don't have to prove that). Find the matrix A such that (TS)(x) = Ax for all vectors R³. Here is some information that you might find useful: The vector 2 is perpendicular to the plane. 3 −21] -7 . The vectors 3 and 0 30 are perpendicular to the line. They are also perpendicular to each other.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter11: Topics From Analytic Geometry
Section11.4: Plane Curves And Parametric Equations
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Problem 23. Consider the plane P in R³ defined by the equation x+2y+3z = 0 and the line L in R³ spanned
[9]
by the vector 3 Let S R³ R³ denote the reflection through the plane P: it takes a vector in R³ and
transforms it into its mirror image, the mirror being the plane P. Let T : R3 → R³ denote the 90° rotation
around L of your choice (i.e. you can choose if the rotation is clockwise or counterclockwise). Both S and T
are linear transformations (you don't have to prove that). Find the matrix A such that (TS)(x) = Ax for all
vectors R³. Here is some information that you might find useful:
The vector 2 is perpendicular to the plane.
3
−21]
-7
. The vectors 3 and
0
30
are perpendicular to the line. They are also perpendicular to each other.
Transcribed Image Text:Problem 23. Consider the plane P in R³ defined by the equation x+2y+3z = 0 and the line L in R³ spanned [9] by the vector 3 Let S R³ R³ denote the reflection through the plane P: it takes a vector in R³ and transforms it into its mirror image, the mirror being the plane P. Let T : R3 → R³ denote the 90° rotation around L of your choice (i.e. you can choose if the rotation is clockwise or counterclockwise). Both S and T are linear transformations (you don't have to prove that). Find the matrix A such that (TS)(x) = Ax for all vectors R³. Here is some information that you might find useful: The vector 2 is perpendicular to the plane. 3 −21] -7 . The vectors 3 and 0 30 are perpendicular to the line. They are also perpendicular to each other.
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