Settings That Affect Graph Math Operations - Texas Instruments TI-86 Manual Book

96
Chapter 6: Graph Tools
The menu
GRAPH MATH
differs slightly for and
Pol
graphing modes
Param
(Chapters 8 and 9).
DifEq graphing mode has no
menu.
GRAPH MATH
ROOT Finds the root of a function using a specified left bound, right bound, and guess
dyàdx Finds a numeric derivative (slope) of a function at the trace cursor location
‰f(x) Finds a function's numerical integral using a specified left bounds and right bound
FMIN Finds a function's minimum using a specified left bound, right bound, and guess
FMAX Finds a function's maximum using a specified left bound, right bound, and guess
INFLC Finds a function's inflection point using a specified left bound, right bound, and guess
Finds a function's y-intercept (
YICPT
ISECT Finds the intersection of two functions using a specified left bound, right bound, and guess
DIST Finds the straight-line distance between a specified left bound and right bound
ARC Finds the distance along a function between two specified points on the function
TANLN Draws the tangent line at a specified point

Settings That Affect GRAPH MATH Operations

The tolerance variable
Accuracy increases as the tolerance value becomes smaller.
The step-size variable
differentiation mode (Chapter 1),
value becomes smaller.
The differentiation mode setting affects
mode is more accurate than
at )
y x=0
(Appendix) affects the accuracy of
tol
(Appendix) affects the accuracy of
d
, and
ARC TANLN
dyàdx
(numeric) mode (Chapter 1).
dxNDer
,
‰f(x) FMIN
,
dyàdx INFLC
. Accuracy increases as the step-size
, , , and
INFLC ARC TANLN
, , and .
FMAX ARC
in
dxNDer
; (exact)
dxDer1