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91影视

If thennmatrices Aand Bare orthogonal, which of the matrices in Exercise 5 through 11 must be orthogonal as well?AB.

Short Answer

Expert verified

The Matrix AB is orthogonal.

Step by step solution

01

Definition of Orthogonal transformation

Annn matrix Ais orthogonal if and only if its columns form an orthonormal basis ofn.

02

Verification whether the given matrix is orthogonal.

Given thatA andB are orthogonal matrices.

By theorem: The Product AB of two orthogonalnn matricesA andB is orthogonal.

Therefore,AB is an orthogonal matrix.

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