Sorry the attachment is not clear. Can't really tell u from a in the attachment. Can attach a clearer version.
Hi,
If I am not mistaken, this can be solved using hyperbolic functions.
I'll break this problem into many sections so you can see what I am doing
Please follow this closely!
If you consider that the hyperbolic functions are
and that
then we can conclude that
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Which means that if you use them in your problem you will get