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Step * 1 of Lemma arcsin-minus1


1. -(r1) ∈ {a:ℝ| (r(-1) ≤ a) ∧ (a ≤ r1)} 
⊢ arcsin(r(-1)) = arcsin(-(r1))
BY
{ (nRNorm 0 THEN Auto) }

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Latex:

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Latex:

1.  -(r1)  \mmember{}  \{a:\mBbbR{}|  (r(-1)  \mleq{}  a)  \mwedge{}  (a  \mleq{}  r1)\} 
\mvdash{}  arcsin(r(-1))  =  arcsin(-(r1))


By

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Latex:
(nRNorm  0  THEN  Auto)

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