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Thread: Pair of tangents

  1. #1
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    Question Pair of tangents

    How can we derive that if from an ext point a pair of tangents are drawn to a conics figure then eqn will be
    SS1=T^2
    where (x1,y1) is the ext point.
    Plz help.
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  2. #2
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    Re: Pair of tangents

    Quote Originally Posted by mak29 View Post
    How can we derive that if from an ext point a pair of tangents are drawn to a conics figure then eqn will be
    SS1=T^2
    where (x1,y1) is the ext point.
    Plz help.
    What is T? What is SS1?
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  3. #3
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    Re: Pair of tangents

    Where 's' is the eqn of conics
    's1' is the eqn when x1and y1 are put to the eqn s
    T is the eqn of tangent to that conic
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  4. #4
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    Re: Pair of tangents

    S and S1 are being multiplied.
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  5. #5
    Senior Member Vinod's Avatar
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    Re: Pair of tangents

    Quote Originally Posted by mak29 View Post
    S and S1 are being multiplied.
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