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Question Number 29231 by Tinkutara last updated on 05/Feb/18

Answered by ajfour last updated on 05/Feb/18

$$eq.ofchordofcontacttocircle$$$${\mathit{x}}^2+{\mathit{y}}^2=1from(x_1,y_1)is$$$${xx}_1+{yy}_1=1$$$$giveneq.ofchordofcontactis$$$$2x+2y=1$$$$souponcomparison$$$$A(x_1,y_1)\equiv (2,2).$$

Commented by Tinkutara last updated on 05/Feb/18

But how this equation is derived? Can this be solved without learning this formula?

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