The basic hyperbolic functions, cosh, sinh and tanh are related to the equilateral hyperbola, x^{2}y^{2}=1.
If the area between a line through the origin, the xaxis, and the hyperbola x^{2}y^{2}=1 has area α/2, then:
The equation used to calculate the hyperbolic cosine is:
The Excel COSH function calculates the hyperbolic cosine (cosh) of a supplied number.
The format of the function is :
Where the number argument is the real number that you want to calculate the cosh of. This can be input to the function either :
Column B of the spreadsheet below, shows examples of the Excel Cosh Function, used to calculate the hyperbolic cosine of three different values.
Formulas:

Results:

Further information and examples of the Excel Cosh function can be found on the Microsoft Office website.