The matrix [[1, 0, 0], [0, 1, 0], [0, 0, 1]] is called:
The matrix [[1, 0, 0], [0, 1, 0], [0, 0, 1]] is called:
- A. Identity matrix
- B. Zero matrix
- C. Symmetric matrix
- D. Skew-symmetric matrix
Answer: A) Identity matrix
Explanation: A square matrix with 1 on the main diagonal and 0 elsewhere is the identity matrix. It is also symmetric and diagonal, but the most specific name is identity matrix.
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