2022年8月至9月：补充内容

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本笔记写于2023-05-21，捞老旧笔记捞出来的。

stanford课程：Signal Processing for Machine Learning

🔗 [EE269 Signal Processing for Machine Learning - Lecture 3] http://web.stanford.edu/class/ee269/Lecture3.pdf

补充一些复数运算的小技巧

分析复数函数：

P184

P185

三角函数的补充内容

🔗 [三角函数基本关系和公式 | Fan's Math World] https://fanhongtao.github.io/math/san-jiao-han-shu-ji-ben-guan-xi-he-gong-shi.html