
Abstract
The new continuous functions for the Fibonacci and Lucas pnumbers using Binet formulas are introduced. The article is of a fundamental interest for Fibonacci numbers theory and theoretical physics.
1. New results in Fibonacci number theory
Modern science, particularly physics [113], widely applies the recurring series of the Fibonacci numbers F(n)
(1) 
and the recurring series of the Lucas numbers L(n)
(2) 
which result from application of the following recurrence relations:
(3) 
(4) 
(5) 
(6) 
The ratio of the adjacent numbers in the Fibonacci series (1) and Lucas series (2) tends toward at the irrational numbercalled the Golden Proportion (Golden Mean) [14—16].
In the 19th century the French mathematician Binet devised two remarkable analytical formulas for the Fibonacci and Lucas numbers [14—16]:
(7) 
(8) 
whereis the Golden Proportion and n = 0, ±1, ±2, ±3...
In recent years, researchers developed further the theory of the Golden Section and the Fibonacci numbers [1730]. Hyperbolic Fibonacci and Lucas functions [21,24,26], which are extensions of Binet formulas for a continuous domain, have a strategic importance for the development of both mathematics and theoretical physics. In a previous article [28], the authors presented a new function of the second power called the Golden Shofar. The graph of this function reminds one of a horn, which is used to blow in the Yom Kippur (The Judgment Day).
The sinusoidal Fibonacci function [28] is a further development of a continuous approach to the Fibonacci numbers theory begun in a series of papers [21,24,26]. The definition of the function is