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JEE Main & Advanced Mathematics Circle and System of Circles Question Bank Tangent and normal to a circle

  • question_answer
    The number of tangents which can be drawn from the point (?1,2) to the circle \[{{x}^{2}}+{{y}^{2}}+2x-4y+4=0\] is [BIT Ranchi 1991]

    A)            1    

    B)            2

    C)            3    

    D)            0

    Correct Answer: D

    Solution :

               Since point lies within the circle, hence no tangent can be drawn.


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