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)
Summary of Contents for Titanium TI-89
Page 9: ...Getting Started 6 TI 89 Titanium keys Ë Ì Í Ê ...
Page 34: ...Getting Started 31 2 or D 2 B u s i n e s s D B D B Press Result ...
Page 43: ...Getting Started 40 3 0 D B D D B D Press Result ...
Page 44: ...Getting Started 41 D 2 0 0 2 D B Scroll down to October and press Press Result ...
Page 58: ...Getting Started 55 Example Set split screen mode to TOP BOTTOM Press Result 3 B D ...
Page 70: ...Getting Started 67 ...
Page 175: ...Operating the Calculator 172 From the Keyboard ...
Page 456: ...Tables 453 ...
Page 527: ...Data Matrix Editor 524 ...
