CPM Homework Help : PC3 Problem 11-45

Write two equations that will generate each of the graphs below, one in terms of sine and one in terms of cosine.

Hint (a):
Using a sine function, the amplitude is $2$ , the period is π, there is no horizontal shift, and the vertical shift is $2$ .

Hint (b):
Using a sine function, it is vertically reflected with an amplitude of $3$ , a period of $4π$ , a horizontal shift of $π/2$ , and no vertical shift.