Takes me back a bit. In 1980 I was writing an APL interpreter for the Apple ][ (alas, not half completed) and purchased a copy of "Software Manual for the Elem

Takes me back a bit. In 1980 I was writing an APL interpreter for the Apple ][ (alas, not half completed) and purchased a copy of "Software Manual for the Elementary Functions" by Cody and Waite. It still sits on my bookshelf 35 years later, awaiting full translation of its algorithms into 6502 code. SQRT, ALOG/ALOG10, EXP, POWER, SIN/COS, TAN/COT, ASIN/ACOS, ATAN/ATAN2, SINH, COSH, TANH, and random number generation. Also useful and comprehensive testing notes for your nascent implementation, with tests written in Fortran.