A circle has equation (x+7)2+(y−24)2=625(x + 7)^2 + (y - 24)^2 = 625(x+7)2+(y−24)2=625.
Find the gradient of the tangent to the circle at the origin.
292 exam-style questions on Edexcel A Level Maths Circles, covering 6.1 Midpoints and Perpendicular Bisectors, 6.2 Equation of a Circle, 6.3 Intersections of Straight Lines and Circles, 6.4 Use Tangent and Chord Properties, and 6.5 Circles and Triangles. Each one has a worked solution and a mark scheme showing where the marks go.