CAIE Further Paper 1 2021 November — Question 5

Exam BoardCAIE
ModuleFurther Paper 1 (Further Paper 1)
Year2021
SessionNovember
TopicPolar coordinates

5 The curve \(C\) has polar equation \(r = 3 + 2 \sin \theta\), for \(- \pi < \theta \leqslant \pi\).
  1. The diagram shows part of \(C\). Sketch the rest of \(C\) on the diagram.
    \includegraphics[max width=\textwidth, alt={}, center]{3dbf7021-79c0-4ebf-b96a-5ddeeed45011-08_865_702_408_1023} The straight line \(l\) has polar equation \(r \sin \theta = 2\).
  2. Add \(l\) to the diagram in part (a) and find the polar coordinates of the points of intersection of \(C\) and \(l\).
  3. The region \(R\) is enclosed by \(C\) and \(l\), and contains the pole. Find the area of \(R\), giving your answer in exact form.