SECH (PQL  xl)
This function rounds the specified number up to the nearest number, using the specified number of decimal places
 Library: PQL \ Spreadsheet \ Math & Trig
 Compatibility: Any content (regardless of data source) in the Tabulate spreadsheet module
 Solve: This function can be used with the Solve plugin: both as part of the objective function and constraint functions
Syntax
SECH(number)
Function Arguments
Name  Description  Type  Optional 
number  This function can take any real number as an argument. The angle argument is the angle in radians for which you want the hyperbolic secant  Number 

Comments
This function is the same as the Microsoft Excel 'SECH' function  using the same inputs, logic and outputs.