I have SymPy expressions as sinh(x) + sinh(y) and I would like to express them as the product
2 sinh((x + y) / 2) cosh((x - y) / 2).
With simplify I can do the reverse and transform the product into the sum and I also know that there is a way to achieve the product to sum transformation on sine and cosine. However, I did not (yet) find a way to achieve what I want with sinh/cosh.
Is there a function or a workaround in SymPy to transform the sum of hyperbolic functions into a product?
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