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Math Help - Integration problem

  1. #1
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    Integration problem

    Question for university and i'm very stuck!

    A soap film is suspended between two circular hoops of radius a located at x = plusminus b as shown below. The film has rotational symmetry about the x axis with radius given by r= c cosh(x/c). The constant c is determined by the solution to a= c cosh(b/c). Using the correct formula, find the total surface area A of the film.

    Any help would be appreciated!
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  2. #2
    MHF Contributor
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    Re: Integration problem

    Hey Annarr.

    Are you aware of polar co-ordinates and how to use them?
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