Comment #9 on issue 2247 by [email protected]: Problem with coth
http://code.google.com/p/sympy/issues/detail?id=2247
But still, I warn to be careful the with even functions like acosh(x).
If your code related with solving of equations then from:
coth(acosh(x)) = a
followed
x/sqrt(1-x**2) = (+/-) a
is not it?
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