Then the elements of the diagonal of A are 1, 4, 6 Rationalised 2023-24
 40
MATHEMATICS
(iv)
Diagonal matrix
A square matrix B = [bij] m × m is said to be a diagonal matrix if all its non
diagonal elements are zero, that is a matrix B = [bij] m × m is said to be a diagonal
matrix if bij = 0, when i ≠ j For example,  A = [4], 
1
0
B
0
2
−

= 



, 
1 1
0
0
C
0
2
0
0
0
3
−



= 





, are diagonal matrices
of order 1, 2, 3, respectively