A handy, fast, reliable, precise tool if you need to find symbolic and numerical derivatives of standard functions. Derivative Calculator Real 45 is programmed in C#. All calculations are done in proprietary data type. The calculator calculates derivatives of high orders of standard functions (including hyperbolic). Calculation history can be stored into text file or printed. Numerical coefficients and values are calculated with precision 45-54 digits. Trigonometric, exponential, logarithmic, and inverse functions. Obtained symbolic formula can be used with calculators Precision series, and with Graphing Calculator 2D Parametric, Graphing Calculator 2D Polar, and Graphing Calculator 2D Numeric for drawing graphs. There is also possibility to use symbolic parameters. For example, sin(a*x)+cos(b*x)+2*c.