How to use
Click the "+" and "-" buttons under a coefficient to change its value.

To reset all values to the default values, click the "Clear" button.


Examples
Phase shifts: A=1, B=1, D=0
C=  -2,  -1,  0,  1,  2

Verical shifts: A=1, B=1, C=0
D=  -2,  -1,  0,  1,  2

Amplitude: B=1, C=0, D=0
A=  -2,  -1,  0,  1,  2

Period: A=1, C=0, D=0
B=  0.2,  0.5,  1.0,  1.5,  2.0


Other Notes
Notice that A determines "amplitide", B determines "period" (period is 2pi/B), C determines "phase" (horizontal shift), and D determines vertical shift.