Notation  cis x  cos x  i  sinx  eix   Is there any article to link to to mention the cis function This function can make working with Euler and De Moivres formulas a lot easier  It is clearer to write on paper and leads to less mistakes not to mention faster An online example of cis although not specific   httpoakroadsystemscomtwtsumdiffhtm  Also a link to an article describing implementing complex exponention in software httpwwwefgcomLabMathematicsComplexNumbershtm The code is in PascalDelphi