This is version 4.1. Use this link to return to the earlier version v 3.4. Reports of any errors or issues to the Webmaster will be greatly appreciated and acted on promptly.
Use of this system is pretty intuitive if you use the "Examples" buttons. For more details, press the Instructions Popup Window link.
For Taylor sums, enter, for instance, taylor(sin(x),0,7) for y1 (see the Instructions Popup Window for more details).
Credits The curve-fit algorithm used here makes extensive use of the code in John C. Pezzullo's Nonlinear Least Squares Regression page, and was used here with his kind permission. Any errors in the current adaptation are mine and not his.
Disclaimer This software is for educational purposes only. Neither its author nor Zweig Media Inc. are liable for any special, incidental, indirect or consequential damages of any kind, or any damages whatsoever resulting from loss of use, data, or profits, whether or not advised of the possibility of damage, and on any theory of liability, arising out of or in connection with the use or performance of this software.

Evaluator (Cartesian and polar mode only)
Round values to
Fractions