Show that the line `7x-3y-1=0` touches the circle `x^2+y^2+5x-7y+4=0` at point `(1,2)`

Solve the following:Show that the line 3x-4y+15=0 is a tangent to the circle x^2+y^2=9 ,Find the point of contact.

The line x/a+y/b=1 will touch the circle x^2+y^2=c^2 if

Answer the following:Show that the line 2x+y+6=0 is a tangent to the circle, x^2+y^2+2x-2y-3=0 .Find its point of contact.

If the line x=7 touches the circle x^2+y^2-4x-6y-12=0 , then the co-ordinates of the point of contact are

Solve the following:Find the co-ordinates of centre of the circle whose radius is 3 units and which touches internally to the circle x^2+y^2-4x-6y-12=0 at point (-1,-1).

The circle x ^(2) + y^(2) +4x -4y+4=0 touches

The point of contact of the tangent to the circle x^2+y^2=5 at the point (1,-2) which touches the circle, x^2+y^2-8x+6y+20=0 is

If x + y+ k =0 touches the circle x ^(2) + y^(2) -2x -4y + 3 =0, then k can be

If the straigth line y=mx+c touches the circle x^2+y^2-4y=0 ,then the value of c will be