Created
January 18, 2012 21:54
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| let inline cosine n (x:^a) : ^a = | |
| let one = LanguagePrimitives.GenericOne | |
| let two = one + one | |
| Seq.unfold (fun (twoIp1, t) -> Some(t, (twoIp1+two, -t*x*x/(twoIp1*(twoIp1+one))))) (one,one) | |
| |> Seq.take n | |
| |> Seq.sum |
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