`" If "x+y+7=0" is a tangent to the circle "x^(2)+y^(2)-4x-6y+k=0" then the point of contact is "`

To the circle x^(2)+y^(2)+8x-4y+4=0 tangent at the point theta=(pi)/(4) is

find the equation pf tangent to the circle x^(2)+y^(2)-6x+4y-3=0 from the point (4,7) also,find the point of contact

The tangents to the circle x^(2)+y^(2)-4x+2y+k=0 at (1,1) is x-2y+1=0 then k=

The tangent of the circle x^(2)+y^(2)-2x-4y-20=0 at (1,7) meets the y -axis at the point

prove that the line 3x+4y+7=0 touches the circle x^2+y^2-4x-6y-12=0 also find the point of contact

Show that the tangent at (-1,2) of the circle x^(2)+y^(2)-4x-8y+7=0 touches the circle x^(2)+y^(2)+4x+6y=0 Also find its point of contact.

Tangents are drawn from the point P(1,-1) to the circle x^2+y^2-4x-6y-3=0 with centre C, A and B are the points of contact. Which of the following are correct?

If line 2x - y + k = 0 is a diameter of circle x^(2) + y^(2) + 6x - 6y + 5 = 0 , then k =