# Difference between revisions of "Mathematical functions"

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* ''board.distance(arr1, arr2)'': Euclidean distane between two vectors | * ''board.distance(arr1, arr2)'': Euclidean distane between two vectors | ||

* ''board.pow(a, b)'': <math>a^b</math> for floating point value of ''b''. Math.pow is defined for integer values of ''b', only. | * ''board.pow(a, b)'': <math>a^b</math> for floating point value of ''b''. Math.pow is defined for integer values of ''b', only. | ||

− | * ''board.round(x, n)'': returns string with fixed point representation of ''x''. | + | * ''board.round(x, n)'': returns string with fixed point representation of ''x''. May be replaced by string.tofixed(n). |

− | May be replaced by string.tofixed(n). | ||

* ''board.cosh(x)'' | * ''board.cosh(x)'' | ||

* ''board.sinh(x)'' | * ''board.sinh(x)'' |

## Revision as of 14:14, 25 January 2009

## Functions of the JavaScript Object Math

The following functions are part of every JavaScript virtual machine:

*Math.abs*;*Math.acos*;*Math.asin*;*Math.atan*;*Math.ceil*;*Math.cos*;*Math.exp*;*Math.floor*;*Math.log*;*Math.max*;*Math.min*;*Math.random*;*Math.sin*;*Math.sqrt*;*Math.tan*;

JSXGraph expands the set of available mathematical functions. To keep the JavaScript implementations clean, the new mathematical functions are part of the JSXGraph board. That means, initially a board has to be created, for example with the command

```
board = JXG.JSXGraph.initBoard('box', {originX: 250, originY: 250, unitX: 40, unitY: 40});
```

Then, the object *board* contains the following additional mathematical functions:

*board.angle(A, B, C)*: for Point objects A, B, C. (A: name string, id string or object pointer)*board.rad(A, B, C)**board.distance(arr1, arr2)*: Euclidean distane between two vectors*board.pow(a, b)*: [math]a^b[/math] for floating point value of*b*. Math.pow is defined for integer values of*b', only.**board.round(x, n)*: returns string with fixed point representation of*x*. May be replaced by string.tofixed(n).*board.cosh(x)**board.sinh(x)**board.D(f)*: Numerically computed derivative of the function*f*, returns a function.*board.I(interval,f)*: Numerically computed v alue integral of the function*f*in the given interval.*board.root(f,x)*: root of the function f. Uses Newton methon with start value*x*.