How-To Geek on MSN

Excel's newest functions are flashy, but these classics are still the best

Old-school Excel functions like SUMPRODUCT, INDEX/MATCH, and IFERROR remain essential for stable, readable, and maintainable ...
How-To Geek on MSN

How to use the ISNUMBER function in Microsoft Excel

Master Excel’s most versatile logical gatekeeper to validate inputs, prevent math crashes, and automate complex spreadsheet ...
Scientific American

10 Secret Trig Functions Your Math Teachers Never Taught You

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American On Monday, the Onion reported that the ...
Nature

Standard Four-Figure Mathematical Tables: including many New Tables, Trigonometrical Functions for Radians, Inverse Trigonometrical and Hyperbolic Functions, and an Extended ...

THE object of the authors of this volume of mathematical tables is “to supply a comprehensive set of tables of the numerical values of the elementary functions which are in constant use in mathematics ...