Metallurgical Engineering > GATE 2024 > Linear Algebra
Which of the following statements is/are correct for a square matrix A with real number entries?
AT denotes the transpose of A and A-1 denotes the inverse of A.
A
A is symmetric if AT = -A.
B
A is skew-symmetric if AT = -A.
C
If A is orthogonal, then AT = A-1.
D
If A is orthogonal, then its determinant is zero.

Correct : b,c

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