Add Maths 0606/23/M/J/20 Q6
6 (a) The curve y = a sin bx + c has a period of 180°, an amplitude of 20 and passes through the point (90°, -3). Find the value of each of the constants a, b and c.
(b) The function g is defined, for -135° G x G 135°, by g(x) = 3tan x/2 -4. Sketch the graph of y = g(x) on the axes below, stating the coordinates of the point where the graph crosses the y-axis.