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Help Mathematica simplify this

  • To: mathgroup at
  • Subject: [mg111069] Help Mathematica simplify this
  • From: Sam Takoy <sam.takoy at>
  • Date: Mon, 19 Jul 2010 02:09:37 -0400 (EDT)


For some reason Mathematica fails to do this:

Assuming[ a Cosh[H/(2 a)] == 1,
   Cosh[H/a] +
    1/2 ((H/a - H/a Cosh[H/a] + 2 Sinh[H/a]) Sinh[H/(2 a)] )/(
     H/(2 a) Sinh[H/(2 a)] - 1/a)]]

The answer is actually 1 and I would think Mathematica could handle 
that. Is there a way to fix this? (This is a warmup for me more 
complicated problems.)


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