D P-1 AP Solution. FA is an identity matrix then A is a diagonal matrix. Pin On Estudiar Which of the following isare true about matrices. . Which of the above statements isare correct. B A unit matrix is a diagonal matrix c beginbmatrix1003em01endbmatrix is the identity matrix for addition of 2 2 matrix d beginbmatrix4x03em13endbmatrix beginbmatrix4503em10endbmatrix if x 5. Which of the following is a diagonal matrix. The identity matrix In. A a i j m m is a square matrix such that entry a i j 0 i j then A is called diagonal matrix. If A is a square matrix then A is invertible. The difference between non singular and singular Matrix is by looking at the word single that. In the following diagonal matrix is. Wiley John Sons Incorporated. So an easy way to remember. The matrix 1 0 0 0 2 0 0 0 3 0 0 0 is a diagonal matrix. A 1 4 3 2 1 4 3 2 1 2 1 2 1 2 1 2. A symmetric diago