ITYM sin not cos; the former intersects y=x for integers, while the later intersects for multiples of 0.5. And the extremums would be at n + (-1)n sin-1( 1 / rπ )/π (for integer n).

</pedant> :)

Update: Gah, I had 2π rather than rπ because I used that as the constant when I checked things.

In reply to Re^4: Reverse engineering a formula... by Fletch
in thread Reverse engineering a formula... by devnul

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