Texas Instruments Titanium TI-89, User Manual

Page: 843 / 977

840 Appendix A: Functions and Instructions
sec()
MATH/Trig menu
sec( expression1 )
⇒
expression
sec( list1 )
⇒
list
Returns the secant of expression1 or returns a list
containing the secants of all elements in list1.
Note: The argument is interpreted as either a
degree or radian angle, according to the current
angle mode.
In Degree angle mode:
sec(45)
¸
(2)
sec({1,2.3,4})
¸
1
cos(1)
1.000…
1
cos(4)
sec
L
1 ()
MATH/Trig menu
sec
L 1
(
expression1
)
⇒
expression
sec
L 1
(
list1
)
⇒
list
Returns the angle whose secant is expression1 or
returns a list containing the inverse secants of each
element of
list1.
Note: The result is interpreted as either a degree or
radian angle, according to the current angle mode.
In Degree angle mode:
sec
L
1
(1)
¸
0
In Radian angle mode:
sec
L
1
({1,2,5})
¸
0
p
3
cos
L 1
(1/5)
sech()
MATH/Hyperbolic menu
sech(
expression1
)
⇒
expression
sech(
list1
)
⇒
list
Returns the hyperbolic secant of expression1 or
returns a list containing the hyperbolic secants of
the
list1 elements.
sech(3)
¸
1
cosh(3)
sech({1,2.3,4})
¸
1
cosh(1)
.198…
1
cosh(4)
sech
L
1 ()
MATH/Hyperbolic menu
sech
L 1
(
expression1
)
⇒
expression
sech
L 1
(
list1
)
⇒
list
Returns the inverse hyperbolic secant of
expression1 or returns a list containing the inverse
hyperbolic secants of each element of
list1.
In Radian angle and Rectangular
complex mode:
sech
L 1
(1) ¸ 0
sech
L 1
({1, L 2,2.1}) ¸
0 (
2
¦
p
3
)
¦ i 1.074… ¦ i
Send
CATALOG
Send
list
CBL 2
é
/CBL
é
(Calculator-Based Laboratory
é
) or
CBR
é
(Calculator-Based Ranger
é
) instruction.
Sends
list
to the link port.
Program segment:
©
:Send {1,0}
:Send {1,2,1}
©
SendCalc
CATALOG
SendCalc
var
Sends variable
var
to the link port, where another
unit linked to that port can receive the variable
value. The receiving unit must be on the Home
screen or must execute
GetCalc
from a program.
If you send from a TI
-
89, TI-92 Plus, or
Voyage™ 200 to a TI
-
92, an error occurs if the
TI
-
92 executes
GetCalc
from a program. In this
case, the sending unit must use
SendChat
instead.
Program segment:
©
:a+b ! x
:SendCalc x
©