Numeric equation solving.
x_{n+1} = x_{n} 
f(x_{n})
/
f'(x_{n})
Quick start:

Press stop to stop iterating, press continue to start iterating
again using the last calculated value as startvalue.
Examples:  
A convergent equation. x=sin(x)3 , startvalue 2
x= 3.3482340796530266 after 1 iterations. 
A divergent equation. 1/x=5 , startvalue 2
x= 16.0 after 1 iterations. 
You can use the following operators:
+  * / ^ sin(..) cos(..) tan(..) asin(..) acos(..) atan(..) sinh(..) cosh(..)
tanh(..) cotan(..)
acotan(..) sqrt(..) ln(..) exp(..)
where exp is "constant e raised to..." and ^ is "power to..".
Predefined constants are:
euler which is the same as exp(1), and pi.
This Applet uses the com.javathings.math class library.
It actually performs a symbolic derivation of the equation before calculating the value.
For more information go to this page