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    Maths-
    General
    Easy

    Question

    For any square matrix A = [aij], aij = 0, when i not equal to j, then A is-

    1. unit matrix    
    2. scalar matrix    
    3. diagonal matrix    
    4. none of these    

    The correct answer is: diagonal matrix

      To define the given condition for a matrix.
      a diagonal matrix is a matrix in which the entries outside the main diagonal are all zero ,i.e., aij = 0, when i not equal to j.

      Therefore, given matrix is diagonal matrix.

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