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JEE Main & Advanced Mathematics Three Dimensional Geometry Question Bank System of Co-ordinates, Direction cosines and direction ratios, Projection

  • question_answer
    From which of  the following the distance of the point \[(1,\,\,2,\,\,3)\]is \[\sqrt{10}\]

    A)            Origin

    B)            x-axis

    C)            y-axis

    D)            z-axis

    Correct Answer: C

    Solution :

               Distance from origin \[=\sqrt{1+4+9}=\sqrt{14}\] and from         y-axis \[=\sqrt{1+9}=\sqrt{10}\].


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