this is all i could gather i dont know how to find the period or amplitude
http://prntscr.com/mbnjcl
+37158 Sin wave sin (x) is parent wave
Period = 24 hours 2pi/24 = pi/12 now sin (pi/12 *x)
Amplitude = (8.3-0.4) / 2 = 3.95 now 3.95 sin ( pi/12 *x)
Midline shifted UP 4.35 now 3.95 sin (pi/12 *x) + 4.35
i got it thanks
it should end up looking like this http://prntscr.com/mbnq1b ?
with the editing
+37158 Yah, flipping back and forth betwen the screenshot and the Forum, I sometimes get the numbers incorrect..... 
