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JEE Main & Advanced Mathematics Circle and System of Circles Question Bank Chord of contact of tangent, Pole and Polar

  • question_answer
    The equation of the chord of contact, if the tangents are drawn from the point (5, ?3) to the circle \[{{x}^{2}}+{{y}^{2}}=10\], is

    A)            \[5x-3y=10\]                           

    B)            \[5x+3y=10\]

    C)            \[3x+5y=10\]                         

    D)            \[3x-5y=10\]

    Correct Answer: A

    Solution :

               It is \[x{{x}_{1}}+y{{y}_{1}}={{a}^{2}}\] i.e., \[5x-3y=10\]


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