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If A=[[cos alpha, -sin alpha],[sin alpha...

If `A=[[cos alpha, -sin alpha],[sin alpha, cos alpha]]`, then `A+A^T=I` if the value of `alpha` is

A

`pi/2`

B

`pi/3`

C

`pi`

D

`(3pi)/2`

Text Solution

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The correct Answer is:
B
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