Looking at the list https://docwiki.embarcadero.com/RADStudio/Sydney/en/Mathematical_Routines , I compiled this missed list 1 * http://docwiki.embarcadero.com/Libraries/Sydney/en/System.Math.SecH * http://docwiki.embarcadero.com/Libraries/Sydney/en/System.Math.CscH * http://docwiki.embarcadero.com/Libraries/Sydney/en/System.Math.CotH 2 * http://docwiki.embarcadero.com/Libraries/Sydney/en/System.Math.ArcSec * http://docwiki.embarcadero.com/Libraries/Sydney/en/System.Math.ArcCsc * http://docwiki.embarcadero.com/Libraries/Sydney/en/System.Math.ArcCot 3 * http://docwiki.embarcadero.com/Libraries/Sydney/en/System.Math.ArcSecH * http://docwiki.embarcadero.com/Libraries/Sydney/en/System.Math.ArcCscH * http://docwiki.embarcadero.com/Libraries/Sydney/en/System.Math.ArcCotH 4 * http://docwiki.embarcadero.com/Libraries/Sydney/en/System.Math.CycleToDeg * http://docwiki.embarcadero.com/Libraries/Sydney/en/System.Math.DegToCycle * http://docwiki.embarcadero.com/Libraries/Sydney/en/System.Math.CycleToGrad * http://docwiki.embarcadero.com/Libraries/Sydney/en/System.Math.GradToCycle