Question

Eqaution of the tangent to $$x^{2}+y^{2}-6x+4y-12=0$$ at $$(-1, 1)$$

A
4x3y+7=0
B
4x+3y7=0
C
3x4y+2=0
D
x2y+4=0

Solution

The correct option is A $$4x-3y + 7 = 0$$Equation of tangent to $$x^{2}+y^{2}-6x+6y-12=0$$ at (1,1) is $$T=0$$$$xx_{1}+yy_{1}-3(x+x_{1})+2(y+y_{1})-12=0$$$$-x+y-3x+3+2y+2-12=0$$$$y-3y-4x-7=0$$$$\Rightarrow 4x+7=3y$$Maths

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