How do we find minimum area of a symmetric soap film in terms of $ r,R, h ,$ when it is known the film surface has form swept out from
$ y = A \cosh ( B x) + C $
$ r = A+ C, \; R= A \cosh Bh + C $ etc.
2026-05-15 08:35:20.1778834120
Minimal film area formula
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