ISRO Mechanical & Aerospace 2013 - Question 48

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If A is Square Matrix of order 3, then product of A and its transpose is

  • A. Unit Matrix
  • B. Zero Matrix
  • C. Identity Matrix
  • D. Symmetric Matrix

Answer: D. Symmetric Matrix

Explanation: (AA^T)^T = (A^T)^T A^T = A A^T. So it is symmetric.

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