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The angle between the pair of tangents d...

The angle between the pair of tangents drawn from a point `P` to the circle `x^2+y^2+4x-6y+9sin^2alpha+13cos^2alpha=0` is `2alpha` . then the equation of the locus of the point `P` is `x^2+y^2+4x-6y+4=0` `x^2+y^2+4x-6y-9=0` `x^2+y^2+4x-6y-4=0` `x^2+y^2+4x-6y+9=0`

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