circular function การใช้

One then expects that the " circular functions " should be reducible to rational functions.
If we identify the parameter in both cases we arrive at a relationship between the circular functions and the hyperbolic ones.
The Gudermannian function gives a direct relationship between the circular functions and the hyperbolic ones that does not involve complex numbers.
I read somewhere ( I think it was New Scientist ) that someone had recently proved that any function can be expressed in terms of circular functions.
These transcendental hyperbolic functions can be converted into circular functions sine and cosine by introducing ( & minus; 1 ) k into the series, resulting in alternating series.