Biorhythms The popular biorhythm theory uses the graphs of three simple sine functions to make predictions about an individual’s physical, emotional, and intellectual potential for a particular day. The graphs are given by y = a sin bt for t in days, with t = 0 corresponding to birth and a = 1 denoting 100% potential.
(a) Find the value of b for the physical cycle, which has a period of 23 days; for the emotional cycle (period 28 days); and for the intellectual cycle (period 33 days).
(b) Evaluate the biorhythm cycles for a person who has just become 21 years of age and is exactly 7670 days old.
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