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Step * of Lemma rcos_wf

∀[x:ℝ]. (rcos(x) ∈ ℝ)
BY
{ (InstLemma `rcos_wf1` [] THEN ParallelLast THEN Auto) }

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Latex:

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


By

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Latex:
(InstLemma  `rcos\_wf1`  []  THEN  ParallelLast  THEN  Auto)

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