Scientific Calculator Precision 72 for scientists, engineers, teachers, and students. Calculates mathematical formulas of any length and complexity. This calculator follows classical approach when uncertainty of f(x) calculation is estimated by formula max|(derivative(f))|*|x*uncertainty(x)|, where maximum of function derivative is considered on interval [x-uncertainty(x),|x+uncertainty(x)]. Thus sin(2*pi)=0+-1E-72 and sin(2*1E20*pi)=0+-1E-52. As we see, the results accuracy degrades with growth of argument, but such approach allows to preserve all trigonometry facts like sin(even number*pi+x)=sin(x). Calculators with multi-precision allows to calculate sin of big argument, like 1E40, with any precision, but cannot calculate sin(1E40*pi) since they dont have pi. The pi becomes for them a floating number with arbitrary precision. It seems strange, because 2*pi corresponds to one rotation and counting rotations is much easier then measuring 1E40 radians. Scientific Calculator Precision 72 has internal precision 81 digits that allows to perform division (the most difficult operation) with precision 72 digits, standard functions (power, logarithm, trigonometric functions, hyperbolic functions) with precision 70-72 digits, and Gamma Function, Lower Incomplete Gamma Function, Upper Incomplete Gamma Function with precision 60-72 digits . In the default mixed mode the calculator treats numbers as integers wherever it is possible. There are 10 variables (or constants) available for storing frequently used numbers. All calculation results are reflected in History rich-text-box, which can be saved in file or printed. Unlimited number of user constants cab be entered and maintained by user. Fundamental constants are available in the prebuilt Common Constants list.

Scientific Calculator Precision 54
Scientific Calculator Precision 54 for scientists, engineers, teachers, and students. Calculates mathematical formulas of any length and complexity.Mathematical Software. Mathematical Research. Mathematical Education. Tvalx Products. more info download

Scientific Calculator Precision 63
Scientific Calculator Precision 63 for scientists, engineers, teachers, and students. Calculates mathematical formulas of any length and complexity.Mathematical Software. Mathematical Research. Mathematical Education. Tvalx Products. more info download

Scientific Calculator Precision 90
Scientific calculator for scientists, engineers, teachers, and students.Scientific Calculator Precision 90 for Windows 98, Windows 2000, Windows Server 2003, Windows XP and Vista.This is a product which can be found most useful by scientists,... more info download

Scientific Calculator Precision 81
For scientists, engineers, teachers, and students.Scientific Calculator Precision 81 for scientists, engineers, teachers, and students. Calculates mathematical formulas of any length and complexity. more info download

Compact Scientific Calculator 54
Scientific Calculator Precision 54 for scientists, engineers, teachers, and students. The calculator was designed with purpose to fit Netbooks and Notebooks with small display. Of course, the calculator can be used on laptop and desktop computers. more info download

College Scientific Calculator 45
College Scientific Calculator 45 for scientists, engineers, teachers, and students. Calculates mathematical formulas of any length and complexity.Mathematical Software. Mathematical Research. Mathematical Education. Tvalx Products. more info download

Compact Scientific Calculator 45

Compact Scientific Calculator 36

College Scientific Calculator 36
Scientific calculator for scientists, engineers, teachers, and students.College Scientific Calculator 36 for scientists, engineers, teachers, and students. Calculates mathematical formulas of any length and complexity. more info download

College Scientific Calculator 27
College Scientific Calculator 27 for scientists, engineers, teachers, and students. Calculates mathematical formulas of any length and complexity.Mathematical Software. Mathematical Research. Mathematical Education. Tvalx Products. more info download

Comfort On-Screen Keyboard Lite
A lightweight virtual keyboard on the computer screen enables you to use the mouse cursor or the touch screen to type text in any available language. Display the icons of shortcuts for Windows and popular applications. Very usefull for touchtyping. more info download

Watermark creator
Watermark Creator is a powerful photo watermarking software for digital photo protection. This photo watermark software places very strong watermarks that no one can remove. Watermark Creator allows you to add text watermark to any picture. more info download

Function Grapher Standard Edition

Matrix Calculator
Matrix calculator operations include: transpose, invert, scale, compute determinant and trace, adjoint, multiply, add, and subtract. Matrices can be saved to a text file for future sessions. A delimiter can be specified to separate elements of the... more info download

KidsMath
Introduction Is a game that teach math table 0 to 12 for children ages 5 to 9. What better way to learn that playing a game. Feature in KidsMath Every level consists of 20 questions. KidsMath as 4 different difficulty level that affect the more info download

Calculator Prompter
Calculator Prompter is a math expression calculator. Calcualtor Prompter has a built-in error recognition system that helps you get correct results. With Calculator Prompter you can enter the whole expression, including brackets, and operators.... more info download

Karnaugh map
Karnaugh map minimalizator - for minimalize logical functions for 3-8 variables. This program help you safe logical circuits. This program is special for students. On left you can see a full map of your function. Negation of variable is big capital. more info download

Math Game
Time that children spend on computer games has not been decreasing. In this new age, parents and teachers can find ways to use the entertainment industry to educate and enlighten our youth. more info download

Algebrus
Scientific calculations and data analysis software. 2D and 3D graphic plots of functions and data. Calculations with vectors, matrices, tensors, complex numbers, fractions, quaternions, polynomials. Data fitting, statistics, optimization, spectrums. more info download

Inverse Matrices
The program provides detailed, step-by-step solution in a tutorial-like format to the following problem: Given a 2x2 matrix, or a 3x3 matrix, or a 4x4 matrix, or a 5x5 matrix. Find its inverse matrix by using the Gauss-Jordan elimination method.... more info download

Equation Grapher