Appendix A: Functions and Instructions
859
tan()
@
2 Y
key
H
Y
key
tan(
expression1
)
⇒
expression
tan(
list1
)
⇒
list
tan(
expression1
)
returns the tangent of the argument
as an expression.
tan(
list1
)
returns a list of the tangents of all elements
in
list1
.
Note:
The argument is interpreted as either a
degree or radian angle, according to the current
angle mode. You can use
ó
or
ô
to override the
angle mode temporarily.
In Degree angle mode:
tan((
p
/4)
ô
)
¸
1
tan(45)
¸
1
tan({0,60,90})
¸
{0
‡
3 undef}
In Radian angle mode:
tan(
p
/4)
¸
1
tan(45
¡
)
¸
1
tan({
p
,
p
/3,-
p
,
p
/4})
¸
{0
‡
3 0 1}
tan(
squareMatrix1
)
⇒
squareMatrix
Returns the matrix tangent of
squareMatrix1
. This is
not the same as calculating the tangent 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:
tan([1,5,3;4,2,1;6,
ë
2,1])
¸
ë
28.291… 26.088… 11.114…
12.117…
ë
7.835…
ë
5.481…
36.818…
ë
32.806…
ë
10.459…
tan
ê
()
@
¥
S
key
H
2
S
key
tan
ê
(
expression1
)
⇒
expression
tan
ê
(
list1
)
⇒
list
tan
ê
(
expression1
)
returns the angle whose tangent
is
expression1
as an expression.
tan
ê
(
list1
)
returns a list of the inverse tangents of
each element of
list1
.
Note:
The result is returned as either a degree or
radian angle, according to the current angle mode
setting.
In Degree angle mode:
tan
ê
(1)
¸
45
In Radian angle mode:
tan
ê
({0,.2,.5})
¸
{0 .197
...
.463
...
}
tan
ê
(
squareMatrix1
)
⇒
squareMatrix
Returns the matrix inverse tangent of
squareMatrix1
.
This is
not the same as calculating the inverse
tangent 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:
tan
ê
([1,5,3;4,2,1;6,
ë
2,1])
¸
ë
.083… 1.266… .622…
.748… .630…
ë
.070…
1.686…
ë
1.182… .455…
tanh()
MATH/Hyperbolic menu
tanh(
expression1
)
⇒
expression
tanh(
list1
)
⇒
list
tanh(
expression1
)
returns the hyperbolic tangent of
the argument as an expression.
tanh(
list
)
returns a list of the hyperbolic tangents of
each element of
list1
.
tanh(1.2)
¸
.833
...
tanh({0,1})
¸
{0 tanh(1)}
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 ...
