Texas Instruments TITANIUM TI-89 - Manual (Page 797)

Appendix A: Functions and Instructions 797
cot() MATH/Trig menu
cot( expression1 )
⇒ ⇒ ⇒ ⇒ expression
cot( list1 ) ⇒ ⇒ ⇒ ⇒ list
Returns the cotangent of expression1 or returns a
list of the cotangents of all elements in list1 .
Note: The result is returned as a degree, gradian
or radian angle, according to the current angle
mode setting.
In Degree angle mode:
cot(45) ¸ 1
In Gradian angle mode:
cot(50) ¸ 1
In Radian angle mode:
cot({1,2.1,3}) ¸
{
1
tan(1)
L.584…
1
tan(3)}
cot LLLL1 () MATH/Trig menu
cot LLLL1 ( expression1 ) ⇒ ⇒ ⇒ ⇒ expression
cot LLLL1 ( list1 )
⇒ ⇒ ⇒ ⇒ list
Returns the angle whose cotangent is
expression1 or returns a list containing the
inverse cotangents of each element of list1 .
Note: The result is returned as a degree, gradian
or radian angle, according to the current angle
mode setting.
In Degree angle mode:
cot L 1 (1) ¸ 45
In Gradian angle mode:
cot L 1 (1) ¸ 50
In Radian angle mode:
cot L 1 (1) ¸
p
4
coth() MATH/Hyperbolic menu
coth( expression1 )
⇒ ⇒ ⇒ ⇒ expression
cot( list1 ) ⇒ ⇒ ⇒ ⇒ list
Returns the hyperbolic cotangent of expression1
or returns a list of the hyperbolic cotangents of all
elements of
list1 .
coth(1.2) ¸ 1.199…
coth({1,3.2}) ¸
{
1
tanh(1)
1.003…
}
coth LLLL1 () MATH/Hyperbolic menu
coth LLLL1 ( expression1 )
⇒ ⇒ ⇒ ⇒ expression
coth LLLL1 ( list1 )
⇒ ⇒ ⇒ ⇒ list
Returns the inverse hyperbolic cotangent of
expression1 or returns a list containing the
inverse hyperbolic cotangents of each element of
list1 .
coth L 1 (3.5) ¸ .293…
coth L 1 ({L2,2.1,6}) ¸
{
L ln(3)
2
.518… ln(7/5)
2
}
crossP() MATH/Matrix/Vector ops menu
crossP( list1 , list2 )
⇒ ⇒ ⇒ ⇒ list
Returns the cross product of list1 and list2 as a list.
list1 and list2 must have equal dimension, and the
dimension must be either 2 or 3.
crossP({a1,b1},{a2,b2}) ¸
{0 0 a1ø b2ì a2ø b1}
crossP({0.1,2.2,л 5},{1,л.5,0}) ¸
{л 2.5 л 5. л 2.25}
crossP( vector1 , vector2 )
⇒ ⇒ ⇒ ⇒ vector
Returns a row or column vector (depending on
the arguments) that is the cross product of
vector1
and vector2 .
Both vector1 and vector2 must be row vectors, or
both must be column vectors. Both vectors must
have equal dimension, and the dimension must
be either 2 or 3.
crossP([1,2,3],[4,5,6]) ¸
[л 3 6 л 3]
crossP([1,2],[3,4]) ¸
[0 0 л 2]