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For any x in the range 0 < x and x < 2*pi radians, find the sum of the following infinite series:

c = 1 + 1/2*cos(x) + 1/2*3/4*cos(2*x) + 1/2*3/4*5/6*cos(3*x) + 1/2*3/4*5/6*7/8*cos(4*x) + ...

as a function of the form c = infinite_series2(x).

25 correct solutions
83 incorrect solutions

Last solution submitted on Feb 01, 2015

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