Texas Instruments TITANIUM TI-89 - Manual (Page 881)

Appendix A: Functions and Instructions 881
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)ùy=1 and
ë y=sin(z),{y,z=2p}) ¸
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}
4444Sphere
MATH/Matrix/Vector ops menu
vector 4444Sphere
Displays the row or column vector in spherical
form [
r q f].
vector must be of dimension 3 and can be either a
row or a column vector.
Note: 4444Sphere is a display-format instruction,
not a conversion function. You can use it only at
the end of an entry line.
[1,2,3]4Sphere
¥ ¸ [3.741 ... 1.107 ... .640 ... ]
[2,pà4,3]4Sphere
¥ ¸
[3.605
...
.785
...
.588
...
]
¸ [‡13 
p
4
 cosê (
3ø ‡13
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