CAIE P1 2007 June — Question 5

Exam BoardCAIE
ModuleP1 (Pure Mathematics 1)
Year2007
SessionJune
TopicRadians, Arc Length and Sector Area

5
\includegraphics[max width=\textwidth, alt={}, center]{b24ed4c7-ab07-45f4-adf2-027734c36b62-2_586_682_1726_733} In the diagram, \(O A B\) is a sector of a circle with centre \(O\) and radius 12 cm . The lines \(A X\) and \(B X\) are tangents to the circle at \(A\) and \(B\) respectively. Angle \(A O B = \frac { 1 } { 3 } \pi\) radians.
  1. Find the exact length of \(A X\), giving your answer in terms of \(\sqrt { } 3\).
  2. Find the area of the shaded region, giving your answer in terms of \(\pi\) and \(\sqrt { } 3\).