Texas Instruments Titanium TI-89, Руководство пользователя

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854 Appendix A: Functions and Instructions
Each solution variable starts at its guessed value if
there is one; otherwise, it starts at 0.0.
Use guesses to seek additional solutions one by
one. For convergence, a guess may have to be
rather close to a solution.
solve( e ^(z) ù y=1 and
ë y=sin(z),{y,z=2
p
}) ¸
y=.001… and z=6.281…
SortA
MATH/List menu
SortA
listName1
[ ,
listName2
] [ ,
listName3
] ...
SortA
vectorName1
[ ,
vectorName2
] [ ,
vectorName3
] ...
Sorts the elements of the first argument in
ascending order.
If you include additional arguments, sorts the
elements of each so that their new positions match
the new positions of the elements in the first
argument.
All arguments must be names of lists or vectors. All
arguments must have equal dimensions.
{2,1,4,3}
!
list1
¸
{2,1,4,3}
SortA list1
¸
Done
list1 ¸ {1 2 3 4}
{4,3,2,1}
!
list2
¸
{4 3 2 1}
SortA list2,list1
¸
Done
list2 ¸ {1 2 3 4}
list1
¸
{4 3 2 1}
SortD
MATH/List menu
SortD
listName1
[ ,
listName2
] [ ,
listName3
] ...
SortD
vectorName1
[ ,
vectorName 2
] [ ,
vectorName 3
] ...
Identical to
SortA
, except
SortD
sorts the elements
in descending order.
{2,1,4,3}
!
list1
¸
{2 1 4 3}
{1,2,3,4}
!
list2
¸
{1 2 3 4}
SortD list1,list2
¸
Done
list1
¸
{4 3 2 1}
list2 ¸ {3 4 1 2}
4
Sphere
MATH/Matrix/Vector ops menu
vector 4
Sphere
Displays the row or column vector in spherical form
[
r o q o f
].
vector
must be of dimension 3 and can be either a
row or a column vector.
Note :
4
Sphere
is a display-format instruction, not a
conversion function. You can use it only at the end
of an entry line.
[1,2,3] 4 Sphere
¥ ¸ [3.741 ... o 1.107 ... o .640 ... ]
[2,
o pà
4,3]
4
Sphere
¥
¸
[3.605 ...
o
.785 ...
o
.588 ... ]
¸ [ ‡
13
o
p
4
o
cos
ê
(
3 ø ‡
1
3
13
)
]
X
Y
Z
(ρ,θ,φ)
θ
φ
ρ
startTmr()
CATALOG
startTmr()
⇒
integer
Returns the current value of the clock in its integer
representation, giving the
starttime
for a timer. You
can enter the
starttime
as an argument in
checkTmr()
to determine how many seconds have
elapsed.
You can run multiple timers simultaneously.
Note: See also
checkTmr()
and
timeCnv()
.
startTmr()
¸
148083315
checkTmr(148083315) 34
startTmr()
!
Timer1
©
startTmr()
!
Timer2
©
checkTmr(Timer1)
!
Timer1Value
©
checkTmr(Timer2)
!
Timer2Value