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Topic: Help with identity
Replies: 15   Last Post: May 9, 2013 7:13 AM

 Messages: [ Previous | Next ]
 Virgil Posts: 8,833 Registered: 1/6/11
Re: Help with identity
Posted: May 8, 2013 2:45 AM

In article <v4sjo8hvdpgibvjlqa3chup5qo4e1at44b@4ax.com>,

> >Would greatly appreciate any pointers to proving the following
> >identity that I came across in Bateman's book on partial
> >differential equations:
> >
> >sinh(x)/(cosh(x) - cos(y) = 1 +
> >
> > sum{n, 1, inf} [exp(-nx)*cos(ny)]

sinh(x)/(cosh(x) - cos(y) =

should be

sinh(x)/(cosh(x) - cos(y) ) =
--

Date Subject Author
4/25/13 Mike Trainor
4/25/13 David C. Ullrich
4/26/13 Mike Trainor
4/26/13 Robin Chapman
5/1/13 Mike Trainor
5/1/13 Mike Trainor
5/2/13 Robin Chapman
5/2/13 Robin Chapman
5/2/13 Mike Trainor
5/2/13 Mike Trainor
4/26/13 David C. Ullrich
4/29/13 Mike Trainor
5/2/13 RGVickson@shaw.ca
5/8/13 AP
5/8/13 Virgil
5/9/13 Mike Trainor