TwilightKiddy
@TwilightKiddy@programming.dev
- Comment on Trigo-nom-etry 1 week ago:
If someone didn’t learn enough trigonometry in school:
1+tan^2^c = cos^2^c/cos^2^c + sin^2^c/cos^2^c = (cos^2^c + sin^2^c)/cos^2^c = 1/cos^2^c;
sqrt(1/cos^2^c) = |sec c|
And here is for the people who still don't get the joke
The reading of the answer is very similar to the word “sexy”, which makes the whole sentence a reference to the song “Sexy and I Know It” by LMFAO.
- Comment on And 299999999 is divisible by 13 1 week ago:
Well, on the side of easy ones there is “if the last digit is divisible by 2, whole number is divisible by 2”. Also works for 5. And if you take last 2 digits, it works for 4. And the legendary “if it ends with 0, it’s divisible by 10”.
- Comment on And 299999999 is divisible by 13 1 week ago:
The divisability rule for 7 is that the difference of doubled last digit of a number and the remaining part of that number is divisible by 7.
E.g. 299’999 → 29’999 - 18 = 29’981 → 2’998 - 2 = 2’996 → 299 - 12 = 287 → 28 - 14 = 14 → 14 mod 7 = 0.
It’s a very nasty divisibility rule. The one for 13 works in the same way, but instead of multiplying by 2, you multiply by 4. There are actually a couple of well-known rules for that, but these are the easiest to remember IMO.
- Comment on gamer stove 4 weeks ago:
How would one go about using that sink?
- Comment on Looking for a gamepad spec aggregation site 2 months ago:
That’s some good data! I’m mostly interested in filtering by Linux support and latency/accuracy measurements. Some of them are very helpful, thank you!
- Submitted 2 months ago to gaming@beehaw.org | 2 comments
- Comment on I remember a time where you would get multiple results from a search with no scrolling 2 months ago:
Using a specialized tool for the task is the way to go, in my opinion. I use OpenStreetMaps when I need to look at the map. If I’m looking for some famous place, I look it up on Wikipedia and jump to OSM from there.