0606 P21 - Jun 2021 - Q4 - 5 marks
7975
The graph of
\(y=a+2\tan bx,\)
where \(a\) and \(b\) are constants, passes through the point \((0,-4)\) and has period \(480^\circ\).
(a) Find the value of \(a\) and of \(b\).
(b) On the axes, sketch the graph of \(y\) for values of \(x\) between \(0^\circ\) and \(480^\circ\).
