7 ms·
This is only a showcase of TeX, the actual value of this cheat-sheet seems pretty low. I used to know most of this when I was in uni, including how to derive i
by osivertsson 5y ago
This is only a showcase of TeX, the actual value of this cheat-sheet seems pretty low.
I used to know most of this when I was in uni, including how to derive it when I needed it. Back then this kind of cheat-sheet would not have helped me apply my knowledge. The actual knowledge was very clear in my head from solving problems, or I remembered some key idea used during derivation and from there could work out the rest.
If you need this kind of cheat-sheet you don't understand the concepts deep enough.
Unfortunately most of this knowledge is now 15 years later either very fuzzy or completely lost from my mind. I guess that happens when it is not being refreshed/applied during the career I chose.
This cheat-sheet serves a reminder of how much knowledge I have lost ;)
- OskarS 5y agoI dunno, this seems like a perfectly reasonable tool. Saying "what was the double angle formula for sin, again?" or "what was the error term in Stirling's approximation" doesn't mean that you don't understand the fundamentals.
- whimsicalism 5y agoI find I don't really need to remember trig as long as i remember how imaginary exponentials and the unit circle works. Def agree on Stirling's though.
- JadeNB 5y ago> I find I don't really need to remember trig as long as i remember how imaginary exponentials and the unit circle works. Or, to phrase it differently, trigonometry is just a different language for the restriction of the complex exponential to the imaginary axis, and you are remembering the facts in translated form. (Which I agree is much better—it's certainly the only way I can ever remember the thicket of identities! But I'd argue that it's still remembering trigonometry.)