Remember when graphing the curves of trig functions sine and cosine, need to know the graph of the basic functions. Then look for amplitude, phase shift, vertical shift and spacing.

Sinx  has period 2Pi, as does Cosx

aSin(bx + c) + d

a is the amplitude

2Pi/b is the period

c is the phase shift

d is the vertical shift

To get the spacing, divide the period by 4

Remember the parent functions sine and cosine have max of 1 and min of -1.