Texas Instruments TI-89 Voyage 200, User Manual

Page: 796 / 1008

796 Appendix A: Functions and Instructions
cos
ê
()
¥ R
key
cos
ê
(
expression1
)
⇒ ⇒ ⇒ ⇒
expression
cos
ê
(
list1
)
⇒ ⇒ ⇒ ⇒
list
cos
ê
(
expression1
)
returns the angle whose cosine
is
expression1
as an expression.
cos ê (
list1
)
returns a list of the inverse cosines 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:
cos
ê
(1)
¸
0
In Gradian angle mode:
cos
ê
(0)
¸
100
In Radian angle mode:
cos
ê
({0,.2,.5})
¸
{
p
2
1.369
...
1.047
...
}
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 …