CircleHard
Question
If the line (x + g) cos θ + (y + f) sin θ = k touches the circle x2 + y2 + 2gx + 2fy + c = 0, then -
Options
A.g2 + f2 = k2 + c2
B.g2 + f2 = k + c
C.g2 + f2 = k2 + c
D.None of these
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