Geo4.46

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Find the equation of the chord of contact of (4,-1) with respect to the circle 2x^{2}+2y^{2}=11\,.

The equation of the chord of contact is xx_{1}+yy_{1}+g(x+x_{1})+f(y+y_{1})+c=0\,

Hence

2x(4)+2y(-1)-11=0\,

8x-2y-11=0\,


Main Page:Geometry:Circles