---
title: "2025-01-20"
---

- [x] Anki Flashcards
- [x] KoL
- [x] OGS
- [ ] Sheet Music (10 min.)
- [ ] Korean (Read 1 Story)

* More flashcards on $\sin$, $\cos$, and the [[trigonometry/index#Pythagorean Identity|Pythagorean Identity]].
* Watched [Space Filling Curves](https://www.youtube.com/watch?v=3s7h2MHQtxc), which provided a concrete example of $\mathbb{R} \times \mathbb{R} \approx \mathbb{R}$.
* Begin adding notes on [[compatible|compatible types]].