Question

Equation of tangents to a circle from an external point

Answer 1

Answer:

Step-by-step explanation:

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Let P(h,k) be a point outside the given circle.Take y-k=m(x-h) as equation of any line passing through P.If this line is a tangent to the given circle then length of perpendicular drawn from center of the circle to this line will be equal to the radius of the circle.Doing this we will get two values of m.Thus two ...