Scientific Calculator Precision 81 1.0.0.0

Scientific Calculator Precision 81 1.0.0.0 is designed to serve you as a useful calculation tool. This is a handy, fast, reliable, precise tool if you need to perform complex mathematical calculations
Scientific Calculator Precision 81 is programmed in C#.

All calculations are done in proprietary data type. The calculator handles mathematical formulas of any length and complexity. Calculation history can be stored into text file or printed. There are ten variables or constants available for storing often used numbers. Prebuilt Common Costants list with fundamental constants. Unlimited User Constants list. Precision of calculations is 81 digits. Trigonometric, hyperbolic, inverse and combinatorial functions. Special numbers NaN, Uncertainty, and Infinity. The 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)], and uncertainty(x)=|x|*10^(-precision). Gamma function, Lower Incomplete Gamma function, Upper Incomplete Gamma function. Summation and product operator has three levels of nesting.

Major Features:

1. Used for Windows 98, Windows 2000, Windows Server 2003, Windows XP and Vista.
2. a product which can be found  most useful by scientists, engineers, professors, and students. 
3. 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-81 and sin(2*1E20*pi)=0+-1E-61. 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)
4. has internal precision 90 digits that allows to perform division (the most difficult operation) with precision 81 digits, standard functions (power, logarithm, trigonometric functions, hyperbolic functions) with precision 79-81 digits, and Gamma Function, Lower Incomplete Gamma Function, Upper Incomplete Gamma Function with precision 69-81 digits .
5. There are 10 variables (or constants) available for storing frequently used numbers.
6. Unlimited number of user constants can be entered and maintained by user.
7. Fundamental constants are available in the prebuilt Common Constants list.

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