sinus   = {}
cosinus = {}
tangens = {}

for i=0,2*math.pi,0.01 do
  sinus[i]   = math.sin(i)
  cosinus[i] = math.cos(i)
  tangens[i] = math.tan(i)
end

file = assert(io.open("my.csv", "w+"))

for i=0, 2*math.pi, 0.01 do
  file:write(i .. "\t" .. sinus[i] .. "\t" .. cosinus[i] .. "\t" .. tangens[i] .. "\n")
end

file:close()