Given “1+1.5707963267949i” as input, the function returns “-5.4E-15+1.175201i” as output.

The imaginary output along the imaginary axis traces the shape of theCOSfunction.

Explanation

The function can be defined using theCOSH,COS,SINH, andSINfunctions.

The definition of the complex hyperbolic cosine function.

COSH Function

The Excel COSH function returns the hyperbolic cosine of a number.

IMSINH Function

The Excel IMSINH function returns the hyperbolic sine of a complex number.

The definition of the complex hyperbolic cosine function.

The definition of the complex hyperbolic cosine function.

The definition of the complex hyperbolic cosine function.

The definition of the complex hyperbolic cosine function.

Excel COSH function

Excel IMSINH function