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@dendari @phaedral @Infrapink @jacquiharper

The crazy thing is... in a way it *is* the same tangent, or at least for a circle.

Most people know that you can plot a circle using:

x=cos theta
y=sin theta

And let theta go from 0 to 2pi (or 0 to 360 if you like)

Because the x and y co-ordinates of a circle are parametrized by the sin and cos.

Tangent has a geometric meaning here too. And this is why it increases without bound as theta gets close to pi/4 (90 degrees)