Which of the following matrix is not orthogonal?
Posted: Thu Jul 14, 2022 9:41 am
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) \(\begin{bmatrix}cosx & sinx \\-sinx & -cosx \end{bmatrix} \)
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) \(\begin{bmatrix}cosx & sinx \\-sinx & -cosx \end{bmatrix} \)