Fibonacci - Home
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If we compare Binet formulas (9) and (10) to the classical hyperbolic functions<br />
wwe notice a similarity.<br />
In [4], the discrete variable k in formulas (9) and (10) was replaced with the continuous variable x that takes its values from the<br />
set of real numbers. Consequently, the following continuous functions, which are called the hyperbolic <strong>Fibonacci</strong> and the<br />
Lucas functions, were introduced:<br />
48<br />
, (11)<br />
. (12)<br />
The hyperbolic <strong>Fibonacci</strong> sine<br />
(13)<br />
The hyperbolic <strong>Fibonacci</strong> cosine<br />
(14)<br />
The hyperbolic Lucas sine<br />
(15)<br />
The hyperbolic Lucas cosine