Simplifying hyperbolic expr
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 01/16/10 4:06pm
I have an expression which is
(2*Cosh[r]^3-2*Sinh[r]^3-3*Cosh[r])/Sinh[r]^(3/2)
When I multiply this expression by 1/(Sinh(r))^(3/2) it reduces to a polynomial in Coth[r]
i.e.
3*Coth[r]-Coth[r]^3-2
Can you help me figure out how to make Mathematica realize this?
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