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SSC Sample Paper SSC CHSL (10+2) Sample Test Paper-2

  • question_answer
    Three points A, B, C are on the same line. A circle passes through B and C. Then the focus of the tangent drawn from A to the circle, if the diameter of the circle is\[2a\], is:

    A) \[{{x}^{2}}+{{y}^{2}}={{a}^{2}}\]                      

    B) \[x{{x}_{1}}+y{{y}_{1}}={{a}^{2}}\]  

    C) \[xy=0\]           

    D)        \[x+y=0\]

    Correct Answer: B

    Solution :

     The focus of the tangent from a point A). Let having co-ordinates\[({{x}_{1}},\,\,{{y}_{1}})\] is equation of the tangent, which is\[x{{x}_{1}}+y{{y}_{1}}={{a}^{2}}\]


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