Texas Instruments TI-86 - Manual (Page 410)

398
Appendix
99APPX.DOC TI-86, Appendix, US English Bob Fedorisko Revised: 02/27/01 1:20 PM Printed: 02/27/01 1:26 PM Page 398 of 26 99APPX.DOC TI-86, Appendix, US English Bob Fedorisko Revised: 02/27/01 1:20 PM Printed: 02/27/01 1:26 PM Page 398 of 26 99APPX.DOC TI-86, Appendix, US English Bob Fedorisko Revised: 02/27/01 1:20 PM Printed: 02/27/01 1:26 PM Page 398 of 26
You can omit the close parenthesis ( ) ) at the end of an expression. All open parenthetical
elements are closed automatically at the end of an expression. This is also true for open
parenthetical elements that precede the store or display-conversion instructions.
Open parentheses after list names, matrix names, or equation function names are not
interpreted as implied multiplication. Arguments that follow these open parentheses are
specified list elements, matrix elements, or values for which to solve the equation function.
TOL (The Tolerance Editor) - ™ )
On the TI -86, the computational accuracy of some
functions is controlled by the variables tol and d . The
values stored to these variables may affect the speed at
which the TI
-86 calculates or plots.
The variable tol defines the tolerance in calculating the functions fnInt( , fMin( , fMax( , and arc( ,
and the GRAPH MATH operations G f(x) , FMIN , FMAX , and ARC (Chapter 6). tol must be a
positive value ‚ 1 E L 12.
The value stored to d must be a positive real number. d defines the step size the TI -86 uses
to calculate the functions arc in dxNDer mode; nDer ; and the operations dy à dx , dr à d q , dy à dt ,
dx à dt , INFLC , TANLN , and ARC , all in dxNDer mode (Chapter 6).
To store a value to tol or d on the home screen or in a program, use X. You can select tol and
d from the CATALOG . Also, you can enter tol directly and select d from the CHAR GREEK menu.