Eksponentielle form

                  z = a + i·b = r·e^iφ   

                                          hvor
                                                          r =√(a²+b²)     

                                                          φ = tan^-1(b/a)

det vil for
        
   A = √(3) + i         sige

                    r = √( (√(3))² + 1² )  = 2

                    φ = tan^-1(1/√(3)) = (π/6)        

så     
   A = √(3) + i = 2·e^i·(π/6)