1.

If a given line is tangent to the circle then perpendicular distance from centre of the circle is equal to radius of the circle solve the following : If 4l^(2)-5m^(2)+6l+1=0 then the director circle of the circle whose tangent is lx + my + 1 = 0 is

Answer»

`X^(2)+y^(2)+6x-1=0`
`x^(2)+y^(2)-6x-1=0`
`x^(2)+y^(2)-6x-10=0`
`x^(2)+y^(2)+6x+1=0`

ANSWER :B


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