正在加载视频...
视频加载失败
The geometry of the trigonometric functions [🎞️ pi.mathematica]
5 条评论

berlin17 天前
The geometry of trigonometric functions ye kiya hi comment me bta ho

Lexi 💕17 天前
i like this account

The Unexplained Files17 天前
Ptolemy's Almagest, Book I chapter 11, tabulates every half-degree chord in a circle of diameter 120, and the 1515 printing gives the half-degree chord as 0 31 25 (Wikimedia Commons).

Rick 🇺🇸17 天前
Beautiful: the rotating radius and its projections make sine and cosine feel inevitable. It’s a modern animation of the old chord method—later recast as sine tables in Indian astronomy—and the same circular-motion idea that underlies Fourier analysis.

berlin17 天前
Mja khara hi



