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Step * of Lemma cosine-is-limit

∀x:ℝ. Σi.-1^i * (x^2 * i)/(2 * i)! = cosine(x)
BY
{ (Auto THEN Unfold `cosine` 0 THEN (GenConclAtAddr [2;1] THENA Auto) THEN D -2 THEN Reduce 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}x:\mBbbR{}.  \mSigma{}i.-1\^{}i  *  (x\^{}2  *  i)/(2  *  i)!  =  cosine(x)


By

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Latex:
(Auto
  THEN  Unfold  `cosine`  0
  THEN  (GenConclAtAddr  [2;1]  THENA  Auto)
  THEN  D  -2
  THEN  Reduce  0
  THEN  Auto)

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