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Re-arranging cosh to make x the subject

  1. Jan 29, 2013 #1
    Hi everyone, my first post so forgive me if its rubbish!
    I have been set a question in my HNC course and have hit a wall with where to proceed with it. I would just post the question but rather than that and you giving me the answer I would rather learn how to do it myself, so I will answer a similar one.

    I need to calculate x in the following when y = 50
    y=38cosh(x/40)

    How would I go about making x the subject so I can calculate it? Or is it even more simple than that?
    Any help is greatly appreciated
    Cheers
    :)
     
  2. jcsd
  3. Jan 29, 2013 #2

    haruspex

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    There is a defined function for this, arccosh.
     
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