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Does the arccos itself contain all solutions or just one solution?

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#definition #inverse #periodic-functions
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Fourier Sine Series -The region where the function is defined and its period

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#fourier-series #periodic-functions
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Period T of function $y = \cos(nx)$

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#trigonometry #periodic-functions
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Proof that any integer of the fundamental period, is also a period of the function?

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#calculus #fourier-analysis #fourier-series #periodic-functions
358
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Solution to harmonic oscillator with periodic forcing

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#ordinary-differential-equations #periodic-functions
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What is the fundamental period of $f(x)=\frac{|\sin x|+|\cos x|}{|\sin x -\cos x|}$

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#periodic-functions
320
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Let $f\colon\Bbb R\to \Bbb R-\{3\}$ be a function such that there exist $T>0$ with $f(x+T)=\frac{f(x)-5}{f(x)-3}$ for every $x\in\Bbb R$.

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#functions #periodic-functions
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Show that $f(x):=\cos(x^2)$ is not periodic.

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#real-analysis #functions #periodic-functions
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Evaluating a definite integral of a Bessel-type function

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#definite-integrals #periodic-functions #bessel-functions #trigonometry
140
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Why do the periods of a meromorphic fuction form a discrete module?

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#general-topology #elementary-set-theory #periodic-functions
258
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How to calculate the period of a nonlinear Diff Eq?

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#ordinary-differential-equations #numerical-methods #periodic-functions
87
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Passage in a proof from Hofer-Zehnder

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#calculus-of-variations #periodic-functions #symplectic-geometry #euler-lagrange-equation
1.5k
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secret formula for the "sin" wave with variable rising/falling edge

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#geometry #graphing-functions #signal-processing #periodic-functions
56
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Fundamental matrix of $y''+\epsilon f(t)y=0$

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#ordinary-differential-equations #periodic-functions
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Proof: sum, multiplication and division of two periodic function

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#functions #periodic-functions

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