Chapter 03 — The Fourier Series and Fourier Transform

Taylor vs Fourier Approximation 泰勒展开 vs 傅里叶级数

Taylor series approximates a function locally around a point; Fourier series approximates globally over a period. Adjust the number of terms to see the difference.
泰勒级数在某一点附近局部逼近函数；傅里叶级数在整个周期上全局逼近。调节项数观察差异。