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

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

for line in file:lines() do
  i,s,c,t = string.match(line, "(-?%d+.?%d*)\t(-?%d+.?%d*)\t(-?%d+.?%d*)\t(-?%d+.?%d*)")
  print(i,s,c,t)
  sinus[i]   = tonumber(s);
  cosinus[i] = tonumber(c);
  tangens[i] = tonumber(t);
end

file:close()