Using the identity (AB)^T = B^TA^T , show the following: i. If A is any non-singular matrix, then (A−1)^T = (AT)^−1 . ii. If A is a non-singular symmetric matrix, then A^−1is also symmetric.

Advanced Engineering Mathematics
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Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Using the identity (AB)^T = B^TA^T

, show the following:

i. If A is any non-singular matrix, then (A−1)^T = (AT)^−1
.

ii. If A is a non-singular symmetric matrix, then A^−1is also symmetric.

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