A circle C C\,C has centre (4,2)(4,2)(4,2) The point AAA (10,8)(10,8)(10,8) lies on the circumference of the circle.
Find the gradient of the radius CACACA.
Hence, find the equation of the tangent to the circle at AAA.
130 exam-style questions on Eduqas GCSE Maths Perpendicular Lines and the equation of a tangent. Each one has a worked solution and a mark scheme showing where the marks go.