AQA FP3 2012 January — Question 8

Exam BoardAQA
ModuleFP3 (Further Pure Mathematics 3)
Year2012
SessionJanuary
TopicPolar coordinates

8 The diagram shows a sketch of the curve \(C\) with polar equation $$r = 3 + 2 \cos \theta , \quad 0 \leqslant \theta \leqslant 2 \pi$$ \includegraphics[max width=\textwidth, alt={}, center]{80c4336c-b0ca-46de-a871-812e6923f7f2-4_463_668_1468_699}
  1. Find the area of the region bounded by the curve \(C\).
  2. A circle, whose cartesian equation is \(( x - 4 ) ^ { 2 } + y ^ { 2 } = 16\), intersects the curve \(C\) at the points \(A\) and \(B\).
    1. Find, in surd form, the length of \(A B\).
    2. Find the perimeter of the segment \(A O B\) of the circle, where \(O\) is the pole.