1.

The pair of tangents from (2,1) to the circle x^(2)+y^(2)=1 is

Answer»

`3Y^(2)-4xy+16x+8y-20=0`
`3y^(2)+4xy+4x-2y-5=0`
`3X^(2)-4xy-16x-8y+20=0`
`3x^(2)-4xy-16x+8y-20=0`

ANSWER :A


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