Reference FQL API reference Math Math.atan() Math.atan() Get the inverse tangent in radians of a Number. Signature Math.atan(x: Number) => Number Description Gets the inverse tangent in radians of a Number. Parameters Parameter Type Required Description x Number true A number. Return value Type Description Number Inverse tangent in radians of the provided number. Examples Math.atan(1) 0.7853981633974483 Math.asin() Math.ceil()