Texas Instruments TI-89 cot() , cot, coth, coth() , crossP()

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)}
cotL
LL
L1() MATH/Trig menu
cotL
LL
L1(
expression1 ) ⇒
⇒⇒
⇒ expression
cotL
LL
L1(
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:
cotL1(1) ¸ 45
In Gradian angle mode:
cotL1(1) ¸ 50
In Radian angle mode:
cotL1(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… }
cothL
LL
L1() MATH/Hyperbolic menu
cothL
LL
L1(
expression1 ) ⇒
⇒⇒
⇒ expression
cothL
LL
L1(
list1 ) ⇒
⇒⇒
⇒ list
Returns the inverse hyperbolic cotangent of
expression1 or returns a list containing the
inverse hyperbolic cotangents of each element of
list1 .
cothL1(3.5) ¸ .293…
cothL1({L2,2.1,6}) ¸
{
Lln(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 a1øb2ìa2øb1}
crossP({0.1,2.2,ë5},{1,ë.5,0}) ¸
{ë2.5 ë5. ë2.25}
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]) ¸
[ë3 6 ë3]
crossP([1,2],[3,4]) ¸
[0 0 ë2]