The purpose of this applet
is to illustrate how the values of a, b, c and k affect the graph
of the sine function. It is supposed to function as follows:

Use the scroll bar to change
the values of a, b, k and c. The graph of the sine function should
change as these values change. The value of each parameter to the
left of the scroll bar should also be updated. The changes should
happen as follows:

- Changing a will move
the graph up or down by |a| units.
- Changing b will change
the amplitude (thus the range).
- Changing k affects the
period. The period is 2 pi / k.
- Changing c will cause
the graph to be shifted left or right by |c| units.