Find The Equation Of The Tangent To The Circle x2 + y2 = 16 Drawn From The Point (1, 4).

Find the equation of the circle passing through the points of intersection of the circles x² + y² – 2x – 4y – 4 = 0 and x² + y² – 10x – 12y – 40 = 0.

Find the equation of circle through points of intersection of circle x² + y²– 2x – 4y + 4 = 0 and the line x + 2y = 4 which touches the line x + 2y = 0.

Find the angle between the circles. S = x² + y² – 4x + 6y + 11 = 0 and 

Find the equation of the system of circles coaxial with the circles.

              x² + y² + 4x + 2y + 1 = 0, x² + y² – 2x + 6y – 6 = 0

Also find the equation of that particular circle whose centre lies on radical axis.

Find the locus of pole of the line lx + my + n = 0 with respect to the circle which touches y-axis at the origin.

Find the circle whose diameter is the common chord of the circles

x² + y² + 2x + 3y + 1 = 0 and x² + y² + 4x + 3y + 2 = 0 

S ≡ x² + y² + 2x + 3y + 1 = 0 S’ ≡ x² + y² + 4x + 3y + 2 = 0

Find the equation of circle which cuts the circle x² + y² + 5x + 7y + 4 = 0 orthogonally, has its centre on the line x = 2, and passes through the point (4, –1).

Find the point of intersection of the line 2x + 3y = 18 and the circle x² +y² = 25.

Find the equation of the normal to the circle x² + y² – 5x + 2y – 48 = 0 at point (5, 6).

Find the equation of the image of the circle x² + y² + 16x – 24y + 183 = 0 by the line mirror 4x + 7y + 13 = 0.