List questions from periodic-functions

Published on 30 Mar 2026 - 10:42

244

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Density of a set of periodic points

Published on 22 Jun 2022 - 17:24

770

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Why is the Arccosine of $30$ degrees undefined?

Published on 24 Jun 2022 - 1:39

66

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Convergence of $e^{ix_nt}$ implying convergence of $x_n$

Published on 26 Feb 2026 - 12:44

45

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Fundamental Period of $\sin \big(\frac{3x}{5}\big) + \sec \big(\frac{2x}{7}\big) + \big\{\frac{2x}{\pi}\big\}$

Published on 30 Jun 2022 - 8:23

47

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Doubt while solving a third order differential equation

Published on 28 Mar 2026 - 10:31

70

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Unperiodisation of $\log(|\sin(x/2)|)$

Published on 05 Jul 2022 - 18:00

251

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Spivak, Ch. 14, Prob 12d : Prove if $f'$ is periodic with period $a$ and $f$ is periodic (with some period not necessarily $=a$), then $f(a)=f(0)$.

Published on 07 Jul 2022 - 0:30

63

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periodic functions tending to zero

Published on 17 Jul 2022 - 12:06

208

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Average of periodic functions

Published on 17 Jul 2022 - 16:15

170

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Can you always decompose an $f: [0,\infty) \to \mathbb{R}$ into the sum of a monotonic function and a periodic function?

Published on 17 Jul 2022 - 23:07

19

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Need help figuring out parameters of exponential expression! (Periodicity, sum)

Published on 23 Mar 2026 - 21:45

82

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Existence of pairs

Published on 22 Jul 2022 - 18:27

140

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Bounded non periodic solutions of ${\displaystyle {\dot {x}}=A(t)x}$

Published on 28 Jul 2022 - 16:29

471

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Proving that simple harmonic motion and pendulum motion are periodic

Published on 04 Apr 2026 - 13:38

List Question

Series expansion of $x$ in terms of $\sin(\frac{x}{n})$

Density of a set of periodic points

Why is the Arccosine of $30$ degrees undefined?

Convergence of $e^{ix_nt}$ implying convergence of $x_n$

Fundamental Period of $\sin \big(\frac{3x}{5}\big) + \sec \big(\frac{2x}{7}\big) + \big\{\frac{2x}{\pi}\big\}$

Doubt while solving a third order differential equation

Unperiodisation of $\log(|\sin(x/2)|)$

Spivak, Ch. 14, Prob 12d : Prove if $f'$ is periodic with period $a$ and $f$ is periodic (with some period not necessarily $=a$), then $f(a)=f(0)$.

periodic functions tending to zero

Average of periodic functions

Can you always decompose an $f: [0,\infty) \to \mathbb{R}$ into the sum of a monotonic function and a periodic function?

Need help figuring out parameters of exponential expression! (Periodicity, sum)

Existence of pairs

Bounded non periodic solutions of ${\displaystyle {\dot {x}}=A(t)x}$

Proving that simple harmonic motion and pendulum motion are periodic

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