Texpand Math\Algebra\Trig Menu; Text Catalog; Timecnv Catalog; Title Catalog - Texas Instruments TITANIUM TI-89 User Manual

tExpand()
MATH\Algebra\Trig menu
expression1
tExpand(
Returns an expression in which sines and cosines
of integer-multiple angles, angle sums, and angle
differences are expanded. Because of the identity
2
(sin(x))
equivalent results. Consequently, a result might
differ from a result shown in other publications.
Sometimes
when the default trigonometric simplification
does not.
transformations done by
applying
or vice versa, in two separate steps simplifies an
expression.
Note: Degree-mode scaling by p/180 interferes
with the ability of
expandable forms. For best results,
should be used in Radian mode.
Text
CATALOG
promptString
Text
Displays the character string
box.
If used as part of a
promptString
used as a standalone instruction,
dialog box to display the string.
Then
See If, page 830.
timeCnv()
CATALOG
seconds
timeCnv(
Converts seconds to units of time that can be
more easily understood for evaluation. The list is
in {
days,hours,minutes,seconds
Note: See also
Title
CATALOG
titleString
Title , [
Creates the title of a pull-down menu or dialog
box when used inside a
construct, or a
Note:
Lbl
When present, it allows the menu choice to
branch to a specified label inside the program.
Appendix A: Functions and Instructions
) ⇒ ⇒ ⇒ ⇒
expression
2
+(cos(x)) =1, there are many possible
will accomplish your goals
tExpand()
tends to reverse
tExpand()
tCollect()
to a result from
tCollect()
to recognize
tExpand()
promptString
Dialog...EndDlog block
is displayed inside that dialog box. If
) ⇒ ⇒ ⇒ ⇒
list
} format.
and
checkTmr()
Lbl
]
Toolbar
Dialog...EndDlog
is only valid in the
Toolbar
tExpand(sin(3 f )) ¸
tExpand(cos( aì b )) ¸
. Sometimes
,
tExpand()
tExpand()
Text "Have a nice day." ¸
dialog
,
creates a
Text
timeCnv(152442117)
.
startTmr()
Program segment:
©
or
:Dialog
Custom
block.
:Title
:Request
construct.
:Dropdown
:EndDlog
©
4 ø sin( f ) ø (cos( f )) ñ ì sin( f )
cos( a ) ø cos( b )+sin( a ) ø sin( b )
{1764 9 1 57}
"This is a dialog box"
"Your name",Str1
"Month you were born",
seq(string(i),i,1,12),Var1
Done
889