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AP EAMCET2006MathematicsCircle

The length of the tangent drawn to the circle x^2+y^2-2 x+4 y-11=0 from the point (1,3) is :

Options

  1. A1
  2. B2
  3. C3
  4. D4

Correct answer

C. 3

Step-by-step solution

The length of the tangent drawn to the circle x^2+y^2-2 x+4 y-11=0 from the point (1,3)= 1^2+3^2-2 1+12-11 = 1+9-2+12-11 = 22-13 = 9 =3

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