Which of the following matrix is not orthogonal? – McqOptions

MCQOPTIONS

1.	Which of the following matrix is not orthogonal?
A.	( begin{bmatrix}0.33 & 0.67 & -0.67 -0.67 & 0.67 & 0.33 0.67 & 0.33 & 0.67 end{bmatrix} )
B.	( begin{bmatrix}cosx &sinx -sinx & cosx end{bmatrix} )
C.	( begin{bmatrix}0.33 & -0.67 & 0.67 0.67 & 0.67 & 0.33 -0.67 & 0.33 & 0.67 end{bmatrix} )
D.	( begin{bmatrix}cosx & sinx -sinx & -cosx end{bmatrix} )
Answer» B. ( begin{bmatrix}cosx &sinx -sinx & cosx end{bmatrix} )

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