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JEE Main & Advanced Mathematics Circle and System of Circles Question Bank Tangent and normal to a circle

  • question_answer
    The slope of the tangent at the point \[(h,h)\]of the circle \[{{x}^{2}}+{{y}^{2}}={{a}^{2}}\]is

    A) 0    

    B) 1

    C) -1  

    D) Depends on h

    Correct Answer: C

    Solution :

    \[hx+hy-{{a}^{2}}=0\] has slope \[-1\].


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