DecimalMath.DecimalEx (nuget): Portable math support for Decimal that Microsoft forgot and more.  Includes Decimal versions of Sqrt, Pow, Exp, and Log as well as the trig functions Sin, Cos, Tan, ASin, ACos, ATan, ATan2.  Also included is other functionality for working with numbers in Decimal precision.
Keywords: c#|decimal|math|trigonometry