A circle has the equation x2 + y2 − 6x + 2y − 15 = 0.
a) Find the coordinates of the centre of the circle. b) Find the radius of the circle. c) Show that the tangent to the circle at the point (7, 2) has equation 4x + 3y − 34 = 0.
A circle has the equation x2 + y2 − 6x + 2y − 15 = 0.
a) Find the coordinates of the centre of the circle. b) Find the radius of the circle. c) Show that the tangent to the circle at the point (7, 2) has equation 4x + 3y − 34 = 0.