OCR C1 2012 January — Question 10

Exam BoardOCR
ModuleC1 (Core Mathematics 1)
Year2012
SessionJanuary
TopicCircles

10 A circle has centre \(C ( - 2,4 )\) and radius 5 .
  1. Find the equation of the circle, giving your answer in the form \(x ^ { 2 } + y ^ { 2 } + a x + b y + c = 0\).
  2. Show that the tangent to the circle at the point \(P ( - 5,8 )\) has equation \(3 x - 4 y + 47 = 0\).
  3. Verify that the point \(T ( 3,14 )\) lies on this tangent.
  4. Find the area of the triangle \(C P T\). \section*{THERE ARE NO QUESTIONS WRITTEN ON THIS PAGE}