Find the angle between the circles given by the equations.
`x^2 + y^2 + 6x - 10y - 135 = 0,`
`x^2 + y^2 - 4x+14y - 116 = 0`

Find the angle between the circles given by the equations. x^2 + y^2 - 12x - 6y + 41 = 0, x^2 + y^2 + 4x + 6y - 59 = 0.

Find the angle between the circles x^2 + y^2 + 4x - 14y + 28 = 0 and x^2 + y^2 + 4x - 5 = 0

The circles x^2 + y^2 + 6x + 6y = 0 and x^2 + y^2 - 12x - 12y = 0

Find the angle between the tangents drawn from (3, 2) to the circle x^(2) + y^(2) - 6x + 4y - 2 = 0

The angle between the circles x^2+y^2-2x-4y+3=0 and x^2+y^2-4x-6y+11=0 is

Find the transverse common tangents of the circles x^(2) + y^(2) -4x -10y + 28 = 0 and x^(2) + y^(2) + 4x - 6y + 4= 0.

The angle between the circles x^2+y^2+4x+8y+18=0 and x^2+y^2+2x+6y+8=0 is

Find the equation of the circle the end points of whose diameter are the centres of the circle : x^2 + y^2 + 6x - 14y=1 and x^2 + y^2 - 4x + 10y=2 .

Find the centre and radius of the circle x^(2) + y^(2) + 6x -10y -2 =0

Find the angle between the pair of tangents drawn from (0,0) to the circle x^(2) + y^(2) - 14 x + 2y + 25 = 0.