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If A=[1tanx-tanx1] , show that A^T\ A^(-...

If `A=[1tanx-tanx1]` , show that `A^T\ A^(-1)=[cos2x-sin2xsin2xcos2x]` .

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The correct Answer is:
`[{:(1,-1,0),(-2,3,-4),(-2,3,-3):}]`
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