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Step * of Lemma rcos0

rcos(r0) = r1
BY
{ (RWO "rcos-is-cosine" 0 THEN Auto) }

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Latex:

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Latex:
rcos(r0)  =  r1


By

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Latex:
(RWO  "rcos-is-cosine"  0  THEN  Auto)

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