In `Cos.CosProc()` should ``` if (n == 2) { if (Mod(k, 2) == 1) return 0; } ``` be ``` if (n == 2) { if (Mod(k, 4) == 1) return 0; } ``` ? This would match the pattern of modding by n*2 and the Sin.SinProc() method.
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This would match the pattern of modding by n*2 and the Sin.SinProc() method.