(a) Show that the matrix is orthogonal in three ways: by calculating , by using part (b)
Chapter 7, Problem 1(choose chapter or problem)
(a) Show that the matrix is orthogonal in three ways: by calculating , by using part (b) of Theorem 7.1.1, and by using part (c) of Theorem 7.1.1. (b) Find the inverse of the matrix A in part (a).
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