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TrigToExp of ArcTan function

  • To: mathgroup at smc.vnet.net
  • Subject: [mg38547] TrigToExp of ArcTan function
  • From: Blimbaum Jerry DLPC <BlimbaumJE at ncsc.navy.mil>
  • Date: Wed, 25 Dec 2002 03:12:51 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com


Why does   Cos[ArcTan[x,y]] + I Sin[ArcTan[x,y]]//TrigToExp   not give an
output   of


Exp[I ArcTan[x,y]]   ??


Instead the output  is    x/Sqrt[x^2+y^2] +   I y/Sqrt[x^2 + y^2]........


thanks     jerry blimbaum   NSWC  panama city, fl


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