{
  "name": "cos",
  "type": "function",
  "groups": ["Math"],
  "description": "Returns cosine of an angle.",
  "arguments": [{
    "arg": "angle",
    "description": "angle in radians"
  }],
  "examples": [{
    "expression": "cos(1.571)",
    "returns": "0.000796326710733263"
  }],
  "tags": ["angle", "cosine"]
}