CUET · MATHS · PYQ PAPER 2023
If A is any non-zero square matrix, then the matrix \(P=\frac{1}{2}\left(A-A^T\right)\) is:
- A Symmetric
- B Null matrix
- C Skew-symmetric
- D Scalar matrix
Answer & Solution
Correct Answer
(C) Skew-symmetric
Step-by-step Solution
Detailed explanation
\(P^T = \left(\frac{1}{2}(A-A^T)\right)^T\) \(P^T = \frac{1}{2}(A^T - (A^T)^T)\) \(P^T = \frac{1}{2}(A^T - A)\) \(P^T = -\frac{1}{2}(A - A^T)\) \(P^T = -P\) Skew-symmetric
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