If `D_1 and D_2` are diagonal matices of order `3xx3` then (A) `D_1^n` is a diagonal matrix (B) `D_1D_2=D_2D_1` (C) `D_1^2+D_2^2` is diagonal matrix (D) `D_1D_2` is a diagonal matix

If D_(1) and D_(2) are two 3xx3 diagonal matrices, then which of the following is/are true? D_(1) and D_(2) is a diagonal matrix b.D_(1)D_(2)=D_(2)D_(1) c.D_(1)^(2)+D_(2)^(2) is a diagonal matrix d.none of these

If D_(1) and D_(2) are two 3x3 diagnal matrices where none of the diagonal elements is zero, then

If D_(1) and D_(2) are two 3xx3 diagonal matrices, then which of the following is/are true ?

If d_(1) and d_(2) be the diagonals of a rhombus, then its area is (.....) sq units.

The number of diagonal matrix,A or order n which A^(3)=A is a . is a a.1 b.0 c.2^(n) d.3^(n)

Inverse of diagonal matrix is (A) a diagonal matrix (B) symmetric (C) skew symmetric (D) none of these

If A=[(0,2,-3),(-2,0,-1),(3,1,0)] then A is (A) diagonal matrix (B) symmetric matix (C) skew symmetric matrix (D) none of these

The matrix A = [(1, 2),( 0,1)] is (a) a Unit matrix (b) a diagonal matrix (c) a scalar matrix (d) None of these

The matrix A = [(1, 2),( 0,1)] is (a) a Unit matrix (b) a diagonal matrix (c) a scalar matrix (d) None of these

If A is a matrix of order 3 and |A|=8 , then |a d j\ A|= (a) 1 (b) 2 (c) 2^3 (d) 2^6