@futurebird @dendari @Infrapink @jacquiharper Futurebird: I've got a /visual/ that I cannot articulate, for how the line at a tangent to the semi-circle could be used to re-create the trig tangent curve...but if that tangential line is tangential to a curve other than a semi-circle...uh... B^)
https://mastodon.social/@phaedral/113529840098689900
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