The graph of the cosine is an ellipse

• Authors: Smoluk Antoni
• Languages of publication: PL EN

Abstracts

EN

Periodic function – this is a proposition of the new definition – has as its domain the multiplicative group of complex numbers with module one. Therefore a graph of the function f : T -> R lies on the cylinder T x R, and so the graph of cosine function is the ellipse

Keywords

EN

domain; graph; periodic function; conditional extrema; cylinder

• Publisher: Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
• Journal: Didactics of Mathematics
• Year: 2014
• Issue: 11(15)
• Pages: 59-64

Contributors

author

Smoluk Antoni

References

• Kahane J.-P. (1970). Séries de Fourier absolument convergentes [Absolutely convergent Fourier series]. Ergebnisse der Mathematik und ihrer Grenzgebiete. Band 50. Springer-Verlag. Berlin.
• Steinhaus H. (1954). Kalejdoskop matematyczny [Mathematical snapshots]. Państwowe Zakłady Wydawnictw Szkolnych. Warszawa.