2. An invertible n x n matrix A is called orthogonal if AT = A-1. (a) If A is orthogonal, what are the only possible values for det A? (b) For each value given in part a, give an example of an orthogonal 2 x 2 matrix with that determinant. Show that your examples are orthogonal.

Elementary Linear Algebra (MindTap Course List)
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Chapter2: Matrices
Section2.1: Operations With Matrices
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2. An invertible n x n matrix A is called orthogonal if AT = A-1.
(a) If A is orthogonal, what are the only possible values for det A?
(b) For each value given in part a, give an example of an orthogonal 2 × 2 matrix with that
determinant. Show that your examples are orthogonal.
Transcribed Image Text:2. An invertible n x n matrix A is called orthogonal if AT = A-1. (a) If A is orthogonal, what are the only possible values for det A? (b) For each value given in part a, give an example of an orthogonal 2 × 2 matrix with that determinant. Show that your examples are orthogonal.
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