If A is a square matrix such that \[{{A}^{2}}=I\] where I is the identity matrix, then what is \[{{A}^{-1}}\] equal to?

If A is a square matrix such that \[{{A}^{2}}=I\] where I is the ident

1.	If A is a square matrix such that \[{{A}^{2}}=I\] where I is the identity matrix, then what is \[{{A}^{-1}}\] equal to?
A.	\[A+1\]
B.	Null matrix
C.	A
D.	Transpose of A
Answer» D. Transpose of A

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If A is a square matrix such that \[{{A}^{2}}=I\] where I is the identity matrix, then what is \[{{A}^{-1}}\] equal to?

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