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Re: How to semi-ExpToTrig

  • To: mathgroup at smc.vnet.net
  • Subject: [mg131768] Re: How to semi-ExpToTrig
  • From: Alexei Boulbitch <Alexei.Boulbitch at iee.lu>
  • Date: Tue, 1 Oct 2013 06:21:21 -0400 (EDT)
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Hi,

Could I get Mathematica to "simplify" an expression, such as

E^(1 + x) + E^(1 - x)

to 2E*Cosh[x] ?

Thanks!

Sam


Hi, try this:

expr=E^(1+x)+E^(1-x);

expr // FullSimplify

This gives your desired result. This also:

expr /. Plus[Power[E, Plus[a_, Times[-1, x]]], 
   Power[E, Plus[a_, Times[1, x]]]] -> 2 E^a*Cosh[x]

Have fun, Alexei



Alexei BOULBITCH, Dr., habil.
IEE S.A.
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Office phone :  +352-2454-2566
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e-mail: alexei.boulbitch at iee.lu





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