 
Bisection
Although bisection is no longer used as
a method of finding roots of equations since graphical calculators became
available, it is still often taught in schools. This aplet may help you to
understand the process. 


The program assumes the equation is in
F1(X) of the Function aplet. Given initial upper and lower bounds
within which a root lies, and the degree of accuracy desired for the
solution (number of decimal places), this program will visually show the
progressive narrowing of the bounds in search of a solution. 


Note: This is one instance in
which the program is different for a 38G user than for a 39/40G user, due
to some extra programming commands which are available in the new machine.
The display shown right is for a 39/40G and the 38G display is less
graphical. 
Day of Week
Given a date (day,
month, year), this program will tell you the day of the week. The result
is given as a number. 

It should be noted that there were a
number of serious calendar reforms during the past centuries which will
make the results inaccurate in the case of finding (for example) a date in
the 17th century. 

Log a base b
If you are not
comfortable with the change of base law in logarithms, this program will
give you the log of any number to any base. 

NR Table
This program assumes that the function
has been placed into F1(X) of the Function aplet and then uses the
NewtonRaphson iterative method of x_{n+1}=x_{n}  f(x_{n})/f
'(x_{n}) to find the required root to the degree of accuracy
specified, showing all working in the process. 






Pythagoras
Uses Pythaoras' rule to find the length
of the hypotenuse or one of the other two sides in a right triangle. 




Rule Finder
38G Memory
This program will display the amount of remaining
memory on a 38G. This is not required for a 39/40G since you can
just press the MEMORY button to perform the same function in greater
detail.
Note: This program must NOT be run on a 39/40G. It
will reset the calculator, causing all programs and data to be lost (but
will not otherwise damage it). The version in the 39/40G collection is
just a dummy that prints a message to that effect. 

