Wykres cosinusa jest elipsą

• Authors: Antoni Smoluk

Title variants

EN

Graph of the cosine function is an ellipse

• Languages of publication: PL

Abstracts

EN

Periodic function – it is a proposition of a new definition – has as its domain the multiplicative group T = {z ∈C : |z| = 1} of complex numbers with module one. Therefore the graph of the function f : T → R lies on the cylinder T × R, and so the graph of cosine function is the ellipse (math formula)

Keywords

EN

domain; graph; periodic function; conditional extrema; cylinder

• Publisher: Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
• Journal: Econometrics. Ekonometria. Advances in Applied Data Analytics
• Year: 2014
• Issue: 2(44)
• Pages: 57-61

Contributors

author

Antoni Smoluk

• Uniwersytet Ekonomiczny we Wrocławiu

References

• Kahane J.-P., Séries de Fourier absolument convergentes, Ergebnisse der Mathematik und ihrer Grenzgebiete, Band 50, Springer-Verlag. Berlin1970.
• Steinhaus H., Kalejdoskop matematyczny, Państwowe Zakłady Wydawnictw Szkolnych, Warszawa 1954.