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exponentials to sines and cosines

  • To: mathgroup at smc.vnet.net
  • Subject: [mg42603] exponentials to sines and cosines
  • From: "Will Self" <wself at msubillings.edu>
  • Date: Fri, 18 Jul 2003 05:24:57 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

1.  How do I get Mathematica to rewrite (-1)^(1/3) in standard rectangular
form?

2.  The following function was returned by Mathematica as the solution of a
differential equation.  This function is real.  How do I get Mathematica to
write it in terms of Sines and Cosines?

f[x_]=(1 + E^(x + (-1)^(1/3)*x) + E^((-1)^(1/3)*x + (-1)^(2/3)*x))/
         E^((-1)^(1/3)*x)

Thanks.



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