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JEE Main & Advanced Mathematics Conic Sections Question Bank Parabola

  • question_answer
    From the point (?1, 2) tangent lines are drawn to the parabola \[{{y}^{2}}=4x\], then the equation of chord of contact is [Roorkee 1994]

    A)            \[y=x+1\]                                   

    B)            \[y=x-1\]

    C)            \[y+x=1\]                                   

    D)            None of these

    Correct Answer: B

    Solution :

               Chord of contact of \[(-1,\,2)\] is \[{{y}^{2}}=2x/\pi \] or \[y=x-1\].


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