Gists/sincos.lua

local PI = 3.141592653589793
local HALF_PI = PI * 0.5
local mathsin = math.sin
local mathcos = math.cos

local function cos(x)
  if x % PI == HALF_PI then
    return 0
  end
  return mathcos(x)
end

local function sin(x)
  if x % PI == 0 then
    return 0
  end
  return mathsin(x)
end