This function is only available when connected to a Teradata database.
The standard Hyperbolic Cosine function is supported, generating COSH (expression) and returning a value of type float. When dragging a Hyperbolic Cosine operator into a variable, the following tree element is created.
Variable Creation > Input > Variables: SQL Elements pane - Trigonometric > Hyperbolic Cosine
Columns and/or other expressions can be moved into the (empty) branch of the tree. There are no special properties for the Hyperbolic Cosine operator.