[Difficult mathematics] P1: Fourier transform, series and frequency spectrum

Fourier transform, Fourier series and frequency spectrum

This article is to watch the notes of the series of videos of " Difficult Mathematics" by the up master @房东_bili at station B. The sorted notes will be presented in the form of knowledge cards. Each P video corresponds to a blog post, and each blog post will be based on The content has several knowledge cards.

The original video is as follows:

[Difficult mathematics] P1-Fourier transform, Fourier series and frequency spectrum

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CARD1: Understanding sine/cosine waves from three-dimensional motion

CARD2: Observe the calculation of the triangle wave from the angle of movement

CARD3: ​​Understanding series and frequency spectrum from the perspective of calculus