Texas Instruments Titanium TI-89, Руководство пользователя

Страница: 777 / 977

774 Appendix A: Functions and Instructions
cos
ê
(
squareMatrix1
)
⇒
squareMatrix
Returns the matrix inverse cosine of
squareMatrix1
.
This is not the same as calculating the inverse
cosine of each element. For information about the
calculation method, refer to
cos()
.
squareMatrix1
must be diagonalizable. The result
always contains floating-point numbers.
In Radian angle mode and Rectangular complex
format mode:
cos ê ([1,5,3;4,2,1;6, ë 2,1])
¸






1.734…+.064…
ø
i
ë
1.490…+2.105…
ø
i
…
ë
.725…+1.515…
ø
i
.623…+.778…
ø
i
…
ë 2.083…+2.632… ø
i
1.790… ì 1.271… ø
i
…
cosh()
MATH/Hyperbolic menu
cosh( expression1 )
⇒
expression
cosh( list1 )
⇒
list
cosh (
expression1
)
returns the hyperbolic cosine of
the argument as an expression.
cosh (
list1
)
returns a list of the hyperbolic cosines of
each element of list1 .
cosh(1.2)
¸
1.810 ...
cosh({0,1.2}) ¸ {1 1.810 ... }
cosh( squareMatrix1 )
⇒
squareMatrix
Returns the matrix hyperbolic cosine of
squareMatrix1
. This is not the same as calculating the
hyperbolic cosine of each element. For information
about the calculation method, refer to
cos()
.
squareMatrix1
must be diagonalizable. The result
always contains floating-point numbers.
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
cosh
ê
()
MATH/Hyperbolic menu
cosh
ê
(
expression1
)
⇒
expression
cosh
ê
(
list1
)
⇒
list
cosh
ê
(
expression1
)
returns the inverse hyperbolic
cosine of the argument as an expression.
cosh
ê
(
list1
)
returns a list of the inverse hyperbolic
cosines of each element of
list1
.
cosh
ê
(1)
¸
0
cosh ê ({1,2.1,3}) ¸
{0 1.372 ... cosh
ê
(3)}
cosh
ê
( squareMatrix1 )
⇒
squareMatrix
Returns the matrix inverse hyperbolic cosine of
squareMatrix1
. This is not the same as calculating the
inverse hyperbolic cosine of each element. For
information about the calculation method, refer to
cos()
.
squareMatrix1
must be diagonalizable. The result
always contains floating-point numbers.
In Radian angle mode and Rectangular complex
format mode:
cosh ê ([1,5,3;4,2,1;6, ë 2,1])
¸






2.525…+1.734… ø
i
ë .009… ì 1.490… ø
i
…
.486… ì .725… ø
i
1.662…+.623… ø
i
…
ë
.322…
ì
2.083…
ø
i
1.267…+1.790…
ø
i
…
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 argument is interpreted as either a
degree or radian angle, according to the current
angle mode.
In Degree angle mode:
cot(45)
¸
1
In Radian angle mode:
cot({1,2.1,3})
¸
1
tan(1)
L
.584…
1
tan(3)