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Evaluate |[2"cos"theta, -2"sin"theta], [...

Evaluate `|[2"cos"theta, -2"sin"theta], ["sin" theta, "cos"theta]|`

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The correct Answer is:
2
`Delta = = (2"cos"^(2) theta + 2"sin"^(2) theta) = 2"cos"^(2) theta + "sin"^(2) theta) = (2 xx 1) =2`
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