Texas Instruments TI-89 Titanium User Manual page 827

P4Rx()
MATH/Angle menu
rExpression , q
P4Rx(
) ⇒
, q
rList List
P4Rx(
rMatrix , q Matrix
P4Rx(
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.
P4Ry()
MATH/Angle menu
rExpression , q
P4Ry(
) ⇒
rList , q List
P4Ry(
rMatrix , q Matrix
P4Ry(
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.
part()
CATALOG
expression1 [
part( ,
This advanced programming function lets you
identify and extract all of the sub-expressions in the
simplified result of
For example, if
cos(pù x+3):
• The
cos()
• The sum of (pù x+3) has two operands: pù x
and 3.
• The number 3 has no arguments or operands.
• The product pù 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 pù x is calculated, the result is
added to 3, and then the cosine is calculated.
is the top-level operator because it is applied last.
) ⇒
expression1
part(
Simplifies
level arguments or operands. This returns 0 if
expression1
constant such as p, e , i , or ˆ.
, 0) ⇒
expression1
part(
Simplifies
contains the top-level function name or operator.
This returns
number, variable, or symbolic constant such as p, e ,
i , or ˆ.
824
) ⇒
Expression expression
list
) ⇒
matrix
) ⇒
Expression expression
list
) ⇒
matrix
nonNegativeInteger ]
)
.
expression1
simplifies to
expression1
function has one argument: (pù x+3).
number
and returns the number of top-
expression1
is a number, variable, or symbolic
string
and returns a string that
expression1
if
expression1 expression1
string( )
In Radian angle mode:
P4Rx(r,q) ¸
P4Rx(4,60¡) ¸
P4Rx({ë 3,10,1.3},{p/3,ë p/4,0})
¸
In Radian angle mode:
P4Ry(r,q) ¸
P4Ry(4,60¡) ¸
P4Ry({ë 3,10,1.3},{p/3,ë p/4,0})
¸
¥ ¸ ,
cos()
part(cos(pù x+3)) ¸
Note: cos(pù x+3) has one argument.
part(cos(pù x+3),0) ¸
is a
Appendix A: Functions and Instructions
cos(q)ø r
{
ë 3/2 5ø ‡2
1.3
sin(q)ø r
2ø ‡3
ë 3ø ‡3
{
ë 5ø ‡2
0.
2
"cos"
2
}
}
1