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the length has to be greater than 40 but less than 60
i will try finding an exact value

its somewhere around 45
i dont know how to solve cosh so im using approximation

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I found it to be 44.956, but the online system says that is wrong. But I think I am close

I found this for cosh: http://www.ucl.ac.uk/Mathematics/geomath/level2/hyper/diff11.gif

ive heard of it but i cant operate using it
i can work with sin and cos

\[\int\limits_{-20}^{20}\sqrt(1 + (\sinh(x/20))^2) dx\]

hello!

okay. I tried putting it in wolfram alpha, and it gives me 47.008, and it works. Thanks

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