0.25 + 0.113 \sin(8.31 n) \cos(8.31 (n+1)) - 0.032 \sin(16.6 n) \cos(16.6 (n+1)) - 0.057 \sin(24.9 n) \cos(24.9 (n+1)) for n from 0 to pi / 8.31

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