ESBArcSec Function
Given a Value returns the Angle whose Secant it is, in Radians.

Unit
QESBPCSMath

Declaration
Function ESBArcSec(const X: Extended): Extended;

Description
Return Values are between 0 and Pi.

Parameters
Float to process.

Category
Arithmetic Routines for Floats

Implementation

function ESBArcSec (const X: Extended): Extended;
begin
     if abs (X) < 1 then
          raise EMathError.Create (rsDivideByZero);

     Result := ESBArcCos (1 / X);
End;


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