Uploaded February 2010 | Updated September 2026, 1 day ago

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X(t) = sin(t * 50) * (sin(t * 2000 + sin(t * 50.4) * 35) + 10)
Y(t) = cos(t * 50) * (sin(t * 2000 + sin(t * 50.4) * 35) + 10)
50Hz circle 2KHz AM.
1 watt DPSS laser + DT40pro + soundcard