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COMEDK2018MathematicsCircle

The length of the tangent drawn from any point on the circle x²+y²-4 x+6 y-4=0 to the circle x²+y²-4 x+6 y=0 is

Options

  1. A8
  2. B4
  3. C2
  4. DNone of these

Correct answer

C. 2

Step-by-step solution

Length of tangent from x²+y²+2 g x+2 f y+c₁=0 To the circle x²+y²+2 g x+2 f y+c₂=0 is c₂-c₁ Here, c₂=4 and c₁=0 So, required length = 4-0 = 4 =2

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