Is this the only information you have?
I seem to recall this being posted in another forum?
I know the local sunset max is 15:08 on June 21 and sunset min 9:13 on Dec. 20.
I can get the Amp from (max-min)/2 = 2.975
B value (max+min)/2 = 12.105
Period, T, = 2(pi)/365 = .0172
Vertical shift wx-@=(pi)/2, so (pi/2)-182(.0172)= -1.56, where 182 represents the time in days between max-min.
I get y=2.975sin(.0172x-1.56)+12.105
This gets me very close, but seems off by a few days. What am I doing wrong?
Perfessor Jack of Clubs
Posts: 9 Joined: Sat Feb 05, 2011 8:34 am