Equation of the pair of tangents drawn from the origin to the circle ${x^2} + {y^2} + 2gx + 2fy + c = 0$ is
Equation of the pair of tangents drawn from the origin to the circle ${x^2} + {y^2} + 2gx + 2fy + c = 0$ is
- A
$gx + fy + c({x^2} + {y^2})$
- B
${(gx + fy)^2} = {x^2} + {y^2}$
- C
${(gx + fy)^2} = {c^2}({x^2} + {y^2})$
- D
${(gx + fy)^2} = c({x^2} + {y^2})$
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