P.o.t.W. #6
■ No GDC ■ for SL and HL students The diagram below shows two circles each with a radius of one unit. One circle is fixed with its centre at the origin \(\left( {0,\,0} \right) . The other circle has its centre at the point B \(\left( {b,\,0} \right) such that \(0 \le b \le 2,\;b \in \mathbb{R} . Changing the value of \(b causes the circle with centre B to move along the x-axis and for the area of the region where...