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Re: Simplifying ArcTan

• To: mathgroup at smc.vnet.net
• Subject: [mg55541] Re: [mg55526] Simplifying ArcTan
• From: "Florian Jaccard" <florian.jaccard at he-arc.ch>
• Date: Mon, 28 Mar 2005 03:39:05 -0500 (EST)
• Reply-to: <florian.jaccard at he-arc.ch>
• Sender: owner-wri-mathgroup at wolfram.com

It does !

But you have to avoid 2 mistakes :

1) The brackets on wrong place
2) x may not be Pi/2

In[4]:=
FullSimplify[ArcTan[Cos[x], Sin[x]],
  x >= 0 && x < Pi/2]

Out[4]=
x

-----Message d'origine-----
De : fizzy [mailto:fizzycist at knology.net]
Envoyé : lun., 28. mars 2005 09:42
À : mathgroup at smc.vnet.net
Objet : [mg55526] Simplifying ArcTan



Why does   FullSimplify[ ArcTan[ Cos[x], Sin[x] , x>=0 && x <= Pi/2 ]
not output  x ?


Thanks...jerry blimbaum