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variables versus functions

• To: mathgroup at smc.vnet.net
• Subject: [mg28797] variables versus functions
• From: Julian Sweet <jsweet at engineering.ucsb.edu>
• Date: Sun, 13 May 2001 03:28:46 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

	How is it different to define a variable such as A=Cos[x]
versus a function  A[x_]:=Cos[x] ?  

Furthermore, what If I define two functions  A[x_]:=Cos[x] and
B[x_]=ArcTan[x]?  How would FindRoot[A==B,{x,pi/2}]  treat this
differently than if I just used variable definitions for A & B?


e-mail response appreciated: jsweet at engineering.ucsb.edu