The number pi has an evil twin(mathstodon.xyz)
553 points by pkaeding | 200 comments
A Mastodon thread by John Carlos Baez explaining the lemniscate constant ϖ, an analogue of pi tied to the lemniscate curve and its sl and cl functions.
#trigonometry on Hacker News
2 stories tagged trigonometry, newest first.
New Orleans teenagers found a new proof of the Pythagorean Theorem(keith-mcnulty.medium.com)
849 points by malshe | 227 comments
Medium member-only article by Keith McNulty explaining how two New Orleans teenagers found a new trigonometric proof of the Pythagorean Theorem.