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Step * of Lemma cosine-approx_wf

∀[x:ℝ]. ∀[k:ℕ]. ∀[N:ℕ+].  (cosine-approx(x;k;N) ∈ ℤ)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[x:\mBbbR{}].  \mforall{}[k:\mBbbN{}].  \mforall{}[N:\mBbbN{}\msupplus{}].    (cosine-approx(x;k;N)  \mmember{}  \mBbbZ{})


By

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Latex:
ProveWfLemma

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