If \(A = \begin{bmatrix} 2 \sin \theta & \cos \theta & 0 \\ -2\cos \theta & \sin \theta & 0 \\ -1 & 1 & 1 \end{bmatrix},\) then what is A(adj A) equal to?
(where) I is the identity matrix.
1
Null matrix
2
-I
3
I
4
2I
If \(A = \begin{bmatrix} 2 \sin \theta & \cos \theta & 0 \\ -2\cos \theta & \sin \theta & 0 \\ -1 & 1 & 1 \end{bmatrix},\) then what is A(adj A) equal to?
(where) I is the identity matrix.