1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Hyperbolic functions

  1. Oct 14, 2007 #1
    1. The problem statement, all variables and given/known data
    The Saint Louis arch can be approximated by using a function of the form y=bcosh(x/a). Putting the origin on the ground in the center of the arch and the y axis upward, find an approximate equation for the arch given the dimenson shown in the figure(attachment). In other words, find a and b

    3. The attempt at a solution

    my attempt was that since y=bcosh(x/a) is same as

    y= b-0.5a(e[tex]^{x/a}[/tex]+e[tex]^{-x/a}[/tex])

    I tried to plug in x entercepts and y intercepts and
    slove for the unknown, but it got so complicated and I
    couldn't find either a or b.
    i guess i have to find a different method.
    can anyone help?

    Attached Files:

  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?