HELP

PURPOSE OF THE PROGRAM

Input of arbitrary functions

What can be done with it: 

-value table  x , f(x)
-approximation zeros
-definite integrals
-graphics of f(x), f'(x) and f"(x) 


SYNTAXRULES

The syntax must satisfy to certain conditions. 
The following elements are allowed:

OPERATIONS

+ - * / ^

FUNCTIONS 

sin
cos
tan : goniometric number of an angle, expressed in radians

atn   
asn
acs : cyclometric functions, value of the function in radians.

rad : conversion decimal degrees to radians
deg : conversion radians to decimal degrees 

exp : exponential function with base e
log : logarithm with base 10
ln  : logarithm with base e

abs : absolute value 
sqr : square root


CONSTANTS

p   = 3.1415926
e   = 2.7182818

PARAMETERS

a  b  c  d

NUMBERS

arbitrary numbers
decimal character is a '.'
no scientific notation


Correct use of all the operation characters and parentheses is necessary.

Examples:

tan(rad(2*x+30))
a*sin(p*(x-c))+d

To get a table of values, input the from..to..step-boxes

The curves of the function and of the first and second derivative can be
plotted with the buttons Graph y,Graph y',Graph y",  


The default of the axes is x: [-7, 7] , y: [-7, 7]
With the options we can change these values in two ways:
1. Give new values to Xmin, Xmax, Ymin. 
   Ymax will be calculated so that Ymax-Ymin=Xmax-Xmin
2. Give a new value to the scale: the values of Xmin, Xmax, Ymin en Ymax 
   shall change at the same time.

With the options we can choose 3 different drawwidths.
and turn on or out the grid.

With the options we can choose the number of points that are calculated

It's possible to make a list of functions and save them:
Input the functions in the listbox, followed by 'Enter'. 
Choose the button 'Save'. If you wish at a later time to use these functions
choose 'Open' en select the file out of the list. 
These files are elementary textfiles and get automatically the 
extension .fie . 

Also the Help-file that your reading now, is a textfile 'Help.txt' which
the user can change to his own purpose.

The 'delete'-button can be used to delete the selected function in the list
The 'clg'-button serves to clear the graphic screen.

 
