Description

The calculator evaluates math expressions in high precision. The precision is set in the menu of the main window (Settings->Precision).

Example 1: Simple Expressions

   |          Expression         |    Values   |     |    Result   |
 --|-----------------------------|-------------|-----|-------------|-
 1 | 0.3*2-6/17-3!               |             |  =  | -5.75294... |     
 --|-----------------------------|-------------|-----|-------------|-
 2 | 10*e^8/pi^9                 |             |  =  | 1.000016... |     
 --|-----------------------------|-------------|-----|-------------|-
 3 | 2*sin(pi/4)-sqrt(2)         |             |  =  | 0           |     
 --|-----------------------------|-------------|-----|-------------|-

x^y denotes x to the power of y: 2^3 = 2*2*2 = 8. x! denotes The faculty of x: 4! = 4*3*2*1 = 24. The arguments of functions must be enclosed in braces and the multiplication sign has to be written explicitly.

Example 2: Expressions with Parameters

   |          Expression         |    Values   |     |    Result   |
 --|-----------------------------|-------------|-----|-------------|-
 1 | sin(x)^2+cos(x)^2           | x=0.1       |  =  | 1           |     
 --|-----------------------------|-------------|-----|-------------|-
 2 | sin(x+y)                    | x=0.8,y=0.4 |  =  | 0.932039... |     
 --|-----------------------------|-------------|-----|-------------|-
 3 | sin(x)*cos(y)+cos(x)*sin(y) | x=0.8,y=0.4 |  =  | 0.932039... |     
 --|-----------------------------|-------------|-----|-------------|-
 4 | x-y                         | x=$2,y=$3   |  =  | 0           |     
 --|-----------------------------|-------------|-----|-------------|-
 

In line 4 x and y are set to the results of line 2 and 3. $z is a reference to the result of line z. Only numbers and references can be assigned to the variables in the Values field. Constants or math expressions are not supported.

Example 3: Finding Roots of Expressions

   |          Expression         |    Values   |     |    Result   |
 --|-----------------------------|-------------|-----|-------------|-
 1 | x^2-2                       | x=1         |  =0 | 1.414213... |  
 --|-----------------------------|-------------|-----|-------------|- 
 

The = character can be changed to =0 by clicking on it. The name of the variable for which the root is required has to be "x". The start value given in the Values column has to be close enough to the unknown root. The root finding is done with the secant method.

The following functions are available:

  sin   arcsin   ln 
  cos   arccos   sqrt
  tan   arctan

To copy the result double click on it and press the keys ctrl-c. To paste it to a place that you have selected with the mouse before press ctrl-v.