Calculator User Manual

122
Chapter 8: Polar Graphing
08POL.DOC TI-86, Chap 8, US English Bob Fedorisko Revised: 02/13/01 2:26 PM Printed: 02/13/01 3:02 PM Page 122 of 808POL.DOC TI-86, Chap 8, US English Bob Fedorisko Revised: 02/13/01 2:26 PM Printed: 02/13/01 3:02 PM Page 122 of 808POL.DOC TI-86, Chap 8, US English Bob Fedorisko Revised: 02/13/01 2:26 PM Printed: 02/13/01 3:02 PM Page 122 of 8
The GRAPH MATH Menu
6 / &
MATH DRAW FORMT STGDB RCGDB
DIST dy
à
dx dr
à
d
q
ARC TANLN
dr
à
d
q
Finds the numerical derivative (slope) of a function at a point
The distances calculated by
DIST
and
ARC
are distances in the rectangular coordinate plane.
dy
à
dx
and
dr
à
d
q
are independent of the
RectGC
or
PolarGC
format.
At a point where the derivative is undefined,
TANLN
will draw the line, but no result is
displayed or stored in
Ans
.
Evaluating an Equation for a Specified
q
When the trace cursor is not active, the
GRAPH
menu item
EVAL
evaluates selected polar
equations directly on the graph for a given value of
q
.
eval
in a program or from the home
screen returns a list of
r
values.
Drawing on a Polar Graph
The
GRAPH DRAW
menu items work the same in
Pol
graphing as in
Func
graphing.
DRAW
instruction coordinates in
Pol
graphing mode are the x- and y-coordinates of the graph
screen.
DrInv
is not available in
Pol
graphing mode.
The other
GRAPH MATH
menu items are the same as
described in Chapter 6.