List questions from trigonometric-series

Published on 25 Mar 2026 - 14:21

533

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Maclaurin series of $\sin(5x^2)$

Published on 04 Oct 2022 - 22:52

58

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limit of $1- \cos(ka)$

Published on 05 Oct 2022 - 14:34

589

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Infinite sum of sine

Published on 09 Oct 2022 - 8:40

71

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Sum of inverse tangents of the roots of a polynomial

Published on 14 Oct 2022 - 0:46

98

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Initial Guess for Trigonometric Curve Fitting

Published on 19 Oct 2022 - 6:39

69

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Trigonometric Curve Fitting with Phase Shift

Published on 19 Oct 2022 - 16:55

73

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Prove an inequality involving trigonometric series

Published on 27 Oct 2022 - 2:23

58

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Prove the inequality $\sum_{n=1}^\infty \left(\int_E \cos 2nxdx\right)^2\le \pi |E|$.

Published on 02 Nov 2022 - 10:22

296

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Is there an identity for $\sum_{k=0}^{n-1}\tan^4\left({k\pi\over n}\right)$?

Published on 26 Mar 2026 - 21:27

46

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Find minimum n :$ \prod_{k=1}^n \frac{\arcsin\left( \frac{9k+2}{\sqrt{27k^3+54k^2+36k+8}}\right)}{\arctan \left( \frac{1}{\sqrt{3k+1}} \right)}>2000$

Published on 08 Nov 2022 - 19:16

102

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Any idea on how WolframAlpha did this sum?

Published on 30 Mar 2026 - 5:25

230

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Is this a correct method for finding Fourier series coefficients?

Published on 18 Nov 2022 - 10:08

55

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Cumulative sum of trigonometric functions

Published on 09 Dec 2022 - 13:08

233

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How to prove identity $\sum_{k=0}^{n-1}\tan^2\left(\theta+{k\pi\over n}\right)=n^2\cot^2\left({n\pi\over2}+n\theta\right)+n(n-1)$?

Published on 26 Mar 2026 - 19:39

List Question

Cosine Function As Infinite Product

Maclaurin series of $\sin(5x^2)$

limit of $1- \cos(ka)$

Infinite sum of sine

Sum of inverse tangents of the roots of a polynomial

Initial Guess for Trigonometric Curve Fitting

Trigonometric Curve Fitting with Phase Shift

Prove an inequality involving trigonometric series

Prove the inequality $\sum_{n=1}^\infty \left(\int_E \cos 2nxdx\right)^2\le \pi |E|$.

Is there an identity for $\sum_{k=0}^{n-1}\tan^4\left({k\pi\over n}\right)$?

Find minimum n :$ \prod_{k=1}^n \frac{\arcsin\left( \frac{9k+2}{\sqrt{27k^3+54k^2+36k+8}}\right)}{\arctan \left( \frac{1}{\sqrt{3k+1}} \right)}>2000$

Any idea on how WolframAlpha did this sum?

Is this a correct method for finding Fourier series coefficients?

Cumulative sum of trigonometric functions

How to prove identity $\sum_{k=0}^{n-1}\tan^2\left(\theta+{k\pi\over n}\right)=n^2\cot^2\left({n\pi\over2}+n\theta\right)+n(n-1)$?

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