Philip P. answered • 01/11/18
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The general form is:
y = a·cos(b(x+c)) + d
where
- a = 3 = amplitude
- b = 4 = 2pi/period
- c = horizontal of phase shift
- d = 5 = vertical shift
The period can be found from the relation b = 2pi/period. In your case b=4. Solve for the period.
