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Wykres cosinusa jest elipsą

100%
Smoluk A.
Econometrics. Ekonometria. Advances in Applied Data Analytics
|
2014
|
issue 2(44)
57-61
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)
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The graph of the cosine is an ellipse

100%
Smoluk A.
Didactics of Mathematics
|
2014
|
issue 11(15)
59-64
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
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