Invision Graph Calculator Invision Graph Calculator helps make math a little easier by analyzing mathematical functions with unsurpassed accuracy using high-quality graphs and many features not available on most calculators such ... Cost: $29 Buy full version       Trial version       Publisher: Chambers     Descriptions Invision Graph Calculator: Invision Graph Calculator helps make math a little easier by analyzing mathematical functions with unsurpassed accuracy using high-quality graphs and many features not available on most calculators such as graph printing, full screen color graphs, written derivatives and integrals, illustrations, high derivative capability, and interactive mouse controls. Calculus menu includes derivatives, integrals, maxima, minima, arc length, inflections and roots. Exact differentiation and integration are symbolically written and illustrated. Also the full assortment of trigonometic and hyperbolic functions are available including the inverses. Calculations are accurate to 18 significant digits. Runs on Windows 3.1 or higher. A complete help system and documentation is included.