If both \[A-\frac{1}{2}I\] and \[A+\frac{1}{2}I\] are orthogonal matrices, then

A is skew-symmetric of even order

If both \[A-\frac{1}{2}I\] and \[A+\frac{1}{2}I\] are orthogonal matri

1.	If both \[A-\frac{1}{2}I\] and \[A+\frac{1}{2}I\] are orthogonal matrices, then
A.	A is orthogonal
B.	A is skew-symmetric of even order
C.	\[{{A}^{2}}=\frac{3}{4}I\]
D.	none of these
Answer» C. \[{{A}^{2}}=\frac{3}{4}I\]

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If both \[A-\frac{1}{2}I\] and \[A+\frac{1}{2}I\] are orthogonal matrices, then

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