Calculator User Manual

96
Chapter 6: Graph Tools
06TOOLS.DOC TI-86, Chap 6, US English Bob Fedorisko Revised: 02/13/01 2:23 PM Printed: 02/13/01 3:01 PM Page 96 of 2206TOOLS.DOC TI-86, Chap 6, US English Bob Fedorisko Revised: 02/13/01 2:23 PM Printed: 02/13/01 3:01 PM Page 96 of 22
ROOT
Finds the root of a function using a specified left bound, right bound, and guess
dy
à
dx
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
YICPT
Finds a function’s y-intercept (
y
at
x=0
)
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
tol
(Appendix) affects the accuracy of
‰
f(x)
,
FMIN
,
FMAX
, and
ARC
.
Accuracy increases as the tolerance value becomes smaller.
♦
The step-size variable
d
(Appendix) affects the accuracy of
dy
à
dx
,
INFLC
in
dxNDer
differentiation mode (Chapter 1),
ARC
, and
TANLN
. Accuracy increases as the step-size
value becomes smaller.
♦
The differentiation mode setting affects
dy
à
dx
,
INFLC
,
ARC
, and
TANLN
;
dxDer1
(exact)
mode is more accurate than
dxNDer
(numeric) mode (Chapter 1).
The
GRAPH MATH
menu
differs slightly for
Pol
and
Param
graphing modes
(Chapters 8 and 9).
DifEq
graphing mode has no
GRAPH MATH
menu.