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If two matrices A and B are of order p × q and r × s respectively, can be subtracted only, if
Correct Answer Is : P = r , q = s If I = 
, J = 
and B = 
, then B equals? Correct Answer Is : I cos θ + J sin θ If the trace of a matrix A is 5, then the trace of the matrix 3A is? Correct Answer Is : 15 If A and B are two matrices such that A + B and AB are both defined, then Correct Answer Is : A and B are square matrices of same order If 2A + 3B = 
and A + 2B = 
, then B is equal to?
Correct Answer Is : What must be the matrix X, if 2X + 
= 
?
Correct Answer Is : If A = 
is singular, then the possible values of x are? Correct Answer Is : 0, 12, -12 For how many values of x in the closed interval [-4, -1] is the matrix A = 
singular? Correct Answer Is : 1 If A = diag (2, -1, 3), B = diag (-1, 3, 2), then (A2)B = ? Correct Answer Is : Diag (-4, 3, 18) If A and B are square matrices of order 2, then (A + B)2 = ? Correct Answer Is : A2 + AB + BA + B2