Revision history of "Z coth(z) = 2z/(e^(2z)-1) + z"

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  • (cur | prev) 05:57, 4 March 2018Tom (talk | contribs). . (515 bytes) (+515). . (Created page with "==Theorem== The following formula holds for $|z|<\pi$: $$z \mathrm{coth}(z) = z+\dfrac{2z}{e^{2z}-1},$$ where $\mathrm{coth} denotes hyperbolic cotangent and $e^{2z}$...")