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Tangents drawn from the point P(1,8) to ...

Tangents drawn from the point `P(1,8)` to the circle `x^2 +y^2 -6x -4y-11=0` touch the circle at the points A&B ifR is the radius of circum circle of triangle PAB then [R]-

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Knowledge Check

  • The circle x^2 + y^2 - 4x + 6y + c = 0 touches x axis if

    A
    `c = 4`
    B
    `c^2 = 4`
    C
    `c^2 = 16`
    D
    `c^2 = 9`

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