I need to plot the three biorhythm curves.
The curves start at your birthday, following a sine waveform and have following periods:
emotional curve 28 days, physical curve 23 days and intellectual 33 days.
I need to plot any ones curves for any interval, given the person's birthdate,
startdate for the interval and length of the interval.
The basic curves are: .
. . where is the number of days since the person's birth.
You will need a separate algorithm to calculate
. . for any birthdate and any start-date for the interval.