ReferenceExcel FormulasSupported FormulasCOTOn this pageCOT The COT function returns the cotangent of an angle specified in radians. Syntax =COT(number) Parameters number: The angle in radians for which you want the cotangent Examples =COT(PI()/4) // Returns 1=COT(PI()/2) // Returns 0=COT(PI()/3) // Returns 0.577350269 (approximately)