824
Appendix A: Functions and Instructions
P
4
Rx()
MATH/Angle menu
P
4
Rx(
rExpression
,
q
Expression
)
⇒
expression
P
4
Rx(
rList
,
q
List
)
⇒
list
P
4
Rx(
rMatrix
,
q
Matrix
)
⇒
matrix
Returns the equivalent x-coordinate of the
(r,
q
) pair.
Note:
The
q
argument is interpreted as either a
degree or radian angle, according to the current
angle mode. If the argument is an expression, you
can use
ó
or
ô
to override the angle mode setting
temporarily.
In Radian angle mode:
P
4
Rx(r,
q
)
¸
cos(
q
)
ø
r
P
4
Rx(4,60
¡
)
¸
2
P
4
Rx({
ë
3,10,1.3},{
p
/3,
ë
p
/4,0})
¸
{
ë
3/2 5
ø
‡
2 1.3
}
P
4
Ry()
MATH/Angle menu
P
4
Ry(
rExpression
,
q
Expression
)
⇒
expression
P
4
Ry(
rList
,
q
List
)
⇒
list
P
4
Ry(
rMatrix
,
q
Matrix
)
⇒
matrix
Returns the equivalent y-coordinate of the
(r,
q
) pair.
Note:
The
q
argument is interpreted as either a
degree or radian angle, according to the current
angle mode. If the argument is an expression, you
can use
ó
or
ô
to override the angle mode setting
temporarily.
In Radian angle mode:
P
4
Ry(r,
q
)
¸
sin(
q
)
ø
r
P
4
Ry(4,60
¡
)
¸
2
ø
‡
3
P
4
Ry({
ë
3,10,1.3},{
p
/3,
ë
p
/4,0})
¸
{
ë
3
ø
‡
3
2
ë
5
ø
‡
2 0.
}
part()
CATALOG
part(
expression1[
,
nonNegativeInteger]
)
This advanced programming function lets you
identify and extract all of the sub-expressions in the
simplified result of
expression1
.
For example, if
expression1
simplifies to
cos(
p
ù
x+3):
•
The
cos()
function has one argument: (
p
ù
x+3).
•
The sum of (
p
ù
x+3) has two operands:
p
ù
x
and 3.
•
The number 3 has no arguments or operands.
•
The product
p
ù
x has two operands:
p
and x.
•
The variable x and the symbolic constant
p
have
no arguments or operands.
If x has a numeric value and you press
¥ ¸
,
the numeric value of
p
ù
x is calculated, the result is
added to 3, and then the cosine is calculated.
cos()
is the
top-level
operator because it is applied
last
.
part(
expression1
)
⇒
number
Simplifies
expression1
and returns the number of top-
level arguments or operands. This returns 0 if
expression1
is a number, variable, or symbolic
constant such as
p
,
e,
i
, or
ˆ
.
part(cos(
p
ù
x+3))
¸
1
Note:
cos(
p
ù
x+3) has one argument.
part(
expression1
, 0)
⇒
string
Simplifies
expression1
and returns a string that
contains the top-level function name or operator.
This returns
string(
expression1
)
if
expression1
is a
number, variable, or symbolic constant such as
p
,
e,
i
, or
ˆ
.
part(cos(
p
ù
x+3),0)
¸
"cos"
Summary of Contents for Titanium TI-89
Page 9: ...Getting Started 6 TI 89 Titanium keys Ë Ì Í Ê ...
Page 34: ...Getting Started 31 2 or D 2 B u s i n e s s D B D B Press Result ...
Page 43: ...Getting Started 40 3 0 D B D D B D Press Result ...
Page 44: ...Getting Started 41 D 2 0 0 2 D B Scroll down to October and press Press Result ...
Page 58: ...Getting Started 55 Example Set split screen mode to TOP BOTTOM Press Result 3 B D ...
Page 70: ...Getting Started 67 ...
Page 175: ...Operating the Calculator 172 From the Keyboard ...
Page 456: ...Tables 453 ...
Page 527: ...Data Matrix Editor 524 ...
