MEDIUM
JEE Main/Advance
IMPORTANT
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Identify statements S1, S2, S3 in order for true(T)/false(F)

S1: if A=cosθ-sinθ0sinθcosθ0001, then adj A=A'

S2: if A=a000b000c, then A-1=a000b000c

S3: If B is a non-singular matrix and A is a square matrix, then detB-1AB=det(A)

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Important Questions on Matrices and Determinants

EASY
JEE Main/Advance
IMPORTANT
If A and B are two n×n non-singular matrices, then 
MEDIUM
JEE Main/Advance
IMPORTANT
Let A=123-5 and B=1002 and X be a matrix such that A=BX, then X is equal to
HARD
JEE Main/Advance
IMPORTANT
Let A=-12-3-2033-31 be a matrix, then detA×adjA-1 is equal to -
MEDIUM
JEE Main/Advance
IMPORTANT

STATEMENT-1: If A=a2+x2ab-cxac+bxab+xcb2+x2bc-axac-bxbc+axc2+x2 and B=xc-b-cxab-ax, then A=B2..

STATEMENT-2: If Ac is cofactor matrix of a square matrix A of order n, then Ac=An-1.

MEDIUM
JEE Main/Advance
IMPORTANT
If A=102021203 is a root of polynomial x3-6x2+7x+k=0, then the value of k is
MEDIUM
JEE Main/Advance
IMPORTANT
If A=abcd (where bc0) satisfies the equations x2+k=0, then
MEDIUM
JEE Main/Advance
IMPORTANT
If the system of equations x+2y+3z=4, x+py+2z=3, x+4y+μz=3 has an infinite number of solutions and solution triplet is
MEDIUM
JEE Main/Advance
IMPORTANT

Let λ and α be real. Find the set of all values of λ for which the system of linear equations have infinite solution real values of α.

λx+sinαy+cosαz=0

x+(cosα)y+(sinα)z=0

-x+sinαy+cosαz=0