How do your variable names match up to text?
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Replying to @zip
Ah okay, I see what's up. Lemme find good way to explain...
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Replying to @EmilyGorcenski @zip
btw, the formalism comes from considering e^it = cos t + i sin t, deriv is ie^it = i cos t - sin t, and bookkeeping
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Replying to @zip
Yeah, I just popped into http://math.stackexchange.com and typed there to take advantage of easy MathJax
6:51 PM - 10 Jun 2016
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