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16 September, 11:51

Sigma n=1 to infinity of cos n*pi/2

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  1. 16 September, 13:55
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    H/o just to make sure I'm rite is it cos (npi/2) or cos (npi) / 2? Sorry, I just want to make sure

    > sum ((1/2) * cos*n*Pi, n = 1 ... infinity); " (->) " infinity = 0
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