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

If a circle , whose centre is (-1,1) touches the straight line x+2y+12=0 , then the co-ordinates of the point of contact are

If tangents are drawn to the circle x^2 +y^2=12 at the points where it intersects the circle x^2+y^2-5x+3y-2=0 , then the coordinates of the point of intersection of those tangents are

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

If the line y=mx+c be a tangent to the circle x^2+y^2=a^2 , then the point of contact is

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

If the tangent at (1,7) to the curve x^2=y-6 touches the circle x^2 +y^2+16x+12y+c=0 , then the value of c is

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

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

Circle x ^(2) + y^(2)+6y=0 touches