Question

contruct a pair of tangents to a circle of radius 4 from a point 7 cm away from the centre ​

Answer 1

Answer:

Equation of the pair of tangents drawn from the origin to the circle x2+y2+2gx+2fy+c=0 is · gx+f y+c(x2+y2) · (gx+fy)2=x2+y2 · (gx+fy)2=c2(x2+ y2).

Top answer

The equation of pair of tangent to the circle x2 + y2 + 2gx + 2fy + c = 0 from the point (x1,y1) is (x2 + y2 + 2gx + 2fy + c ) (x12 + y12 + 2gx1 + 2fy1 ... More