Edexcel FP2 2014 June — Question 8

Exam BoardEdexcel
ModuleFP2 (Further Pure Mathematics 2)
Year2014
SessionJune
TopicPolar coordinates

8. \begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{c21767d7-7331-47f7-8e59-06a0727c67c5-13_771_1036_260_593} \captionsetup{labelformat=empty} \caption{Figure 1}
\end{figure} Figure 1 shows a sketch of part of the curve \(C\) with polar equation $$r = 1 + \tan \theta , \quad 0 \leqslant \theta < \frac { \pi } { 2 }$$ The tangent to the curve \(C\) at the point \(P\) is perpendicular to the initial line.
  1. Find the polar coordinates of the point \(P\). The point \(Q\) lies on the curve \(C\), where \(\theta = \frac { \pi } { 3 }\)
    The shaded region \(R\) is bounded by \(O P , O Q\) and the curve \(C\), as shown in Figure 1
  2. Find the exact area of \(R\), giving your answer in the form $$\frac { 1 } { 2 } ( \ln p + \sqrt { q } + r )$$ where \(p , q\) and \(r\) are integers to be found.