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Martices A and B will be inverse of each...

Martices A and B will be inverse of each other only if

A

`AB = BA ne 1`

B

`AB = BA = 0`

C

`AB = 0, BA = 1`

D

`AB = BA = 1`.

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UNITED BOOK HOUSE-SET 13-EXERCISE
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  12. If A = [[cos alpha,sin alpha],[-sin alpha,cos alpha]] then prove that,...

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