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BCECE Engineering BCECE Engineering Solved Paper-2014

  • question_answer
    If two tangents drawn from a point P to the  parabola \[{{y}^{2}}=4x\] are at right angles, then the locus of P is     

    A)           x=1                                        

    B) 2x+1=0           

    C) x=-1                                      

    D) 2x-1=0

    Correct Answer: C

    Solution :

    We know that. the locus of point P from which two perpendicular tangents are drawn to the parabola, is the directrix of the parabola. Hence, required locus is \[~x=-1\].


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