AngouriMath

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EquivalenceRules​(AngouriMath.​Entity,​AngouriMath.​Entity.​Variable,​AngouriMath.​Entity)

 Method (no overloads)

Summary

A vanishing function written as the vanishing argument it is equivalent to, where
that argument is what vanishes. sin(u) / u, tan(u) / u,
arcsin(u) / u and arctan(u) / u all tend to 1 as u tends to 0, so one
may be written for the other in a product or a quotient without changing its limit.

Remarks

The argument's own limit is what the equivalence needs, not the function's. sin(x)
vanishes at pi as surely as at 0 and is not equivalent to x there -- it is equivalent
to pi - x -- so rewriting it as x turned lim x->pi sin(x) / (x - pi), which
is -1, into pi / 0.

























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