A square matrix A is called orthogonal if, A = A 2, A ′ = A − 1, A = A − 1, A = A ′ Where A ′ is the transpose of A .

If A − 1 = A T , then A is orthogonal matrix.

A square matrix A is called orthogonal if

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A square matrix A is called orthogonal if

MathematicsMatricesNDANDA 2018 (Phase 2)

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The correct answer is: $\mathrm{A}^{\prime}=\mathrm{A}^{-1}$

If $\mathrm{A}^{-1}=\mathrm{A}^{\mathrm{T}}$, then $\mathrm{A}$ is orthogonal matrix.

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