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Student Support Forum: 'How to simplify with user defined identity' topicStudent Support Forum > General > Archives > "How to simplify with user defined identity"

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Finite
02/03/13 03:33am

Dear all,

How to simplify b Coth[a h] - a Coth[b h] assuming I have the identity a Tanh[a h] == b Tanh[b h]?

There must be some simple way to make the following code work
Simplify[b Coth[a h] - a Coth[b h], a Tanh[a h] == b Tanh[b h]]

It even doesn't work for
Simplify[ Sinh[a h] - (b Tanh[b h] Cosh[a h])/a,
a Tanh[a h] == b Tanh[b h]]

I have tried ReplaceAll and others while I cannot solve it.

Can anyone help me?



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Subject (listing for 'How to simplify with user defined identity')
Author Date Posted
How to simplify with user defined identity Finite 02/03/13 03:33am
Re: How to simplify with user defined identity yehuda 02/03/13 5:38pm
Re: How to simplify with user defined identity Bill Simpson 02/03/13 9:23pm
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