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kpreid comments on Stupid Questions February 2015 - Less Wrong Discussion

9 Post author: Gondolinian 02 February 2015 12:36AM

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Comment author: kpreid 04 February 2015 04:43:41AM 4 points [-]

I'd like to put in a word for sine:

sin(0) = 0
sin(x) ≈ x

These are highly useful properties in some contexts. That said, cos(0) being the unit prior to any rotation is also nice. (But the definition of a rotation in Cartesian coordinates contains exactly as many sines as cosines; and that generalizes to 3 dimensions where complex numbers do not.)