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Step * of Lemma cosh_wf

∀[x:ℝ]. (cosh(x) ∈ ℝ)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[x:\mBbbR{}].  (cosh(x)  \mmember{}  \mBbbR{})


By

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Latex:
ProveWfLemma

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