Навскидку так
uses math;
for i := 0 to 100 do
begin
point := sin(DegToRad(6*pi/100 + i));
...
end;
fmx
Path1.Data.Clear;
Path1.Data.MoveTo(TPointF.Zero);
for var i := 0 to 1000 do
begin
var Pt := TPointF.Create(i * 10, sin(DegToRad(6*pi/1000+i)));
Path1.Data.LineTo(Pt);
end;