Consider the linear map T : R → R³ that has the standard matrix 1/9 8/9 4/9 A = 8/9 [ 4/9 -4/9 1/9 -4/9 7/9 The matrix A is an orthogonal matrix that is not a special orthogonal matrix. This means A'A = I but its determinant is not 1 (so necessarily its determinant is – 1). We are also given that the linear map T is a reflection map across some plane P through the origin. Suppose that a normal vector to the plane P is some unit normal vector v e R.Which of the following vectors can be that vector v?

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Consider the linear map T : R
R* that has the standard matrix
1/9
8/9
4/9
A =| 8/9 1/9
-4/9
4/9 -4/9 7/9
The matrix A is an orthogonal matrix that is not a special orthogonal matrix. This means A'A = I but its determinant is not 1 (so
necessarily its determinant is –1). We are also glven that the linear map T is a reflection map across some plane P through the
origin. Suppose that a normal vector to the plane P is some unit normal vector v e R.Which of the following vectors can be that
vector v?
Transcribed Image Text:Consider the linear map T : R R* that has the standard matrix 1/9 8/9 4/9 A =| 8/9 1/9 -4/9 4/9 -4/9 7/9 The matrix A is an orthogonal matrix that is not a special orthogonal matrix. This means A'A = I but its determinant is not 1 (so necessarily its determinant is –1). We are also glven that the linear map T is a reflection map across some plane P through the origin. Suppose that a normal vector to the plane P is some unit normal vector v e R.Which of the following vectors can be that vector v?
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