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    \int \frac {a/x}{sinh(a/x)} \ dx
    I need to do this integral find the enthalpy of a change in temperature. With the substitution u = a/x it simplifies to:
    \int \frac {1}{u.sinh(u)} \ du
    but I cant seem to improve it much further. Can anyone help - I'm desperate!
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    (Original post by whiteflock)
    but I cant seem to improve it much further. Can anyone help - I'm desperate!
    You cannot integrate it using normal methods. I suggest you go back and see if you've made an error in your calculations. If you really need a solution, you will need a numerical method.
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    unfortunately I haven't derived this equation - it comes straight out a data book - I'll just numerically solve it - bring on MATLAB.

    thanks for the reply
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    I dunno if this will help any http://www.wolframalpha.com/input/?i...a%2Fx%29%29+dx
 
 
 
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