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Fourier Series of x^2

In this video regarding the Fourier series, I have obtained the expression for x^2 in the interval of -pi to pi. Here, I have discussed the odd functions and even functions. The Fourier series of x^2 is very important to find different identities such as Sum of 1/n^2 Sum of 1/n^4 (   • Fourier Series: Sum of 1/n^4 = pi^4/9...  ) I have verified different identities using this Fourier expression of x^2. Please subscribe to my channel to get those videos.    • Fourier Series: Sum of (1/n^2) = pi^2/6   Hey! I have made this video using the Samsung Galaxy S6 tab. It's highly recommended to use. If you are a grad student you can have this pocket-friendly one. You can use a cool keyboard alongside, which will facilitate ease of working. Link of this Samsung Galaxy S6 tab in amazon.in: https://amzn.to/3Fr00B5 Keyboard for Galaxy S6: https://amzn.to/3Hxmx0Y Pocket-friendly iPad: https://amzn.to/3Ficawa *Books I recommend for Fourier Series Analysis:* 1) Mathematical Methods for Physicists by Weber, Arfken Link: https://amzn.to/3wT7BFC 2) Higher Engineering Mathematics by B. S. Grewal Link: https://amzn.to/3Fr1pYn 3) Mathematical Physics by P. K. Chattopadhyay Link: https://amzn.to/3oynQ7f