Answer: orthogonal.
- A orthogonal
- B idempotent
- C nilpotent
- D singular
Correct answer: A. orthogonal
Explanation: An orthogonal matrix satisfies AᵀA = I, so its transpose is its inverse.
Element aij of matrix A sits at the intersection of row i and column j.
Concept context
Matrix operations, determinants, inverses, and solving linear systems