1.

Froma point P (alpha,beta) a pair of tangents PQ and PR are drawn to circle x^2+y^2-2x-2y-2=0 such that QR is chord of contact.Considering PQ and PR are adjacent sides a parallelogramPQRS is formed .Equation of chord of contact QRis x =0, S_1 and S_2be the circles circumscribing the triangle PQR and QRS. Equation of circle S_1=0 is

Answer»

`x^2+y^2+4x-2y-2=0`
`x^2+y^2-2x+2y-2=0`
`x^2+y^2+2x-2y-2=0`
NONE of these

ANSWER :C


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