Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms....Natural logarithm ARC_SIN Arcsine ARC_COS Arccosine ARC_TAN Arctangent...Arctangent ARC_CSC Arccosecant ARC_SEC Arcsecant ARC_COT Arccotangent...