A circle has equation (x+5)2+(y−12)2=169(x + 5)^2 + (y - 12)^2 = 169(x+5)2+(y−12)2=169.
Find the exact 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.