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MathGroup Archive 2005

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Re: Cross results?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg63210] Re: Cross results?
  • From: "Jean.Pellegri" <Jean.Pellegri at wanadoo.fr>
  • Date: Mon, 19 Dec 2005 07:01:02 -0500 (EST)
  • References: <do3l7r$o0b$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Bonjour

We have :

In[3] := Cross[{10 Sin[x],-10 Cos[x],5/2},{3/25 Sin[x],-3/25 Cos[x], 0}]

Out[3] := {3 Cos[x]/10 , 3 Sin[x]/10 , 0}

The result is OK

Cordialement

Jean Pellegri







"Virgil Stokes" <virgil.stokes at it.uu.se> a écrit dans le message de news: 
do3l7r$o0b$1 at smc.vnet.net...
>I have the following
>
>  x=.
>  Cross[{10 Sin[x],-10 Cos[x],2.5},{0.12 Sin[x],-0.12 Cos[x], 0.0}]
>
> which gives,
>
>  {0.3 Cos[x], 0.3 Sin[x], 0.Cos[x]Sin[x]}
>
> why does it not set the last term to 0.0?
> 



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