Cosh u = (2sinh u) -1(adsbygoogle = window.adsbygoogle || []).push({});

Working from definitions

http://img118.imageshack.us/img118/3271/eusm4.png [Broken]

Its a worked example from the book, which isnt very well explained. The only step i struggle on is from how the managed to get all the u's positive (step 2). I plugged some numbers in for u and find the two equations dont equal each other anyway. What am i doing wrong?

thx

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# Homework Help: Simple Hyperbolic Functions

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