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Tangents are drawn from the point `(alpha, beta)` to the hyperbola `3x^(2)-2y^(2)=6` and are inclined at angle `theta` and `phi` to the x-axis. If `tan theta*tan phi=2`, then the value `2alpha^(2)-beta^(2)` is ____________.

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The correct Answer is:
`(7)`
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