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Step * 2 of Lemma rcos-nonzero-on

.....antecedent..... 
d(-(rsin(x)))/dx = λx.-(rcos(x)) on (-(π/2), π/2)
BY
{ (ProveDerivative THEN Auto) }

1
d(rsin(x))/dx = λx.rcos(x) on (-(π/2), π/2)

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Latex:

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Latex:
.....antecedent..... 
d(-(rsin(x)))/dx  =  \mlambda{}x.-(rcos(x))  on  (-(\mpi{}/2),  \mpi{}/2)


By

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Latex:
(ProveDerivative  THEN  Auto)

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