Texas Instruments TI-89 Manual Book page 441

cosê ()
TI-89: ¥ R key
cosê (expression1)
cosê (list1)
cosê (expression1)
cosine is
cosê (list1)
cosines of each element of
Note: The result is returned as either a
degree or radian angle, according to the
current angle mode setting.
cosê(squareMatrix1)
Returns the matrix inverse cosine of
squareMatrix1
calculating the inverse cosine of each
element. For information about the
calculation method, refer to
squareMatrix1
result always contains floating-point
numbers.
cosh()
MATH/Hyperbolic menu
cosh(expression1)
cosh(list1)
cosh (expression1)
cosine of the argument as an expression.
cosh (list1)
cosines of each element of
cosh(squareMatrix1)
Returns the matrix hyperbolic cosine of
squareMatrix1
calculating the hyperbolic cosine of each
element. For information about the
calculation method, refer to
squareMatrix1
result always contains floating-point
numbers.
coshê ()
MATH/Hyperbolic menu
coshê (expression1)
coshê (list1)
coshê (expression1)
hyperbolic cosine of the argument as an
expression.
coshê (list1)
hyperbolic cosines of each element of
424 Appendix A: Functions and Instructions
TI-92 Plus: 2 R key
expression
list
returns the angle whose
as an expression.
expression1
returns a list of the inverse
.
list1
squareMatrix
. This is not the same as
.
cos()
must be diagonalizable. The
expression
list
returns the hyperbolic
returns a list of the hyperbolic
.
list1
squareMatrix
. This is not the same as
.
cos()
must be diagonalizable. The
expression
list
returns the inverse
returns a list of the inverse
In Degree angle mode:
cosê (1) ¸
In Radian angle mode:
cosê ({0,.2,.5}) ¸
In Radian angle mode and Rectangular
complex format mode:
cosê([1,5,3;4,2,1;6,ë 2,1])
¸
1.734...+.064...øi
ë.725...+1.515...øi .623...+.778...øi
ë 2.083...+2.632...øi 1.790...ì 1.271...øi ...
cosh(1.2) ¸
cosh({0,1.2}) ¸
In Radian angle mode:
cosh([1,5,3;4,2,1;6,ë 2,1])
¸
421.255 253.909 216.905
327.635 255.301 202.958
226.297 216.623 167.628
coshê (1) ¸
coshê ({1,2.1,3}) ¸
{0
.
list1
p
{
1.369... 1.047...
2
ë 1.490...+2.105...øi ...
...
1.810...
{1 1.810...}
1.372... coshê (3)}
0
}
0