Texas TI-86 用户手册

20ATOZ.DOC   TI-86, Chap 20, US English   Bob Fedorisko   Revised: 02/13/01 2:42 PM   Printed: 02/13/01 3:05 PM   Page 358 of 118

SinR [

,]

Uses 

 and 

 for xList and yList, respectively.

These built-in variables must contain valid data of the
same dimension; otherwise, an error occurs. The
regression equation is stored to equationVariable and

.

SinR [

]

Uses 

 and 

, and stores the regression equation

to 

 only.

† graph format screen

(scroll down to
second screen)

In 

 graphing mode, turns on slope fields. To turn

off direction and slope fields, use 

.

†

-

 

t

Solves equation for variable, given an initial guess and
lower

 and upper bounds within which the solution is

sought. equation can be an expression, which is
assumed to equal 0.

Uses 

L1

99 and 1

99 for upper and lower, respectively.

If y=5, solve x

3

+y

2

=125 for x. You guess the

solution is approximately 4:

Uses the secant line between guessLower and
guessUpper

 to start the search. 

 will still search

for a solution outside of this range.