Texas Instruments Titanium TI-89 User Manual

Appendix A: Functions and Instructions 887
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,ë2,1]) ¸






ë 28.291… 26.088… 11.114…
12.117…
ë 7.835… ë 5.481…
36.818…
ë 32.806… ë 10.459…
tanê () ¥ S key
tanê ( expression1 ) ⇒
⇒⇒
⇒ expression
tanê (
list1 ) ⇒
⇒⇒
⇒ list
tanê (
expression1 ) returns the angle whose
tangent is
expression1 as an expression.
tanê ( list1 ) returns a list of the inverse tangents
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:
tanê (1) ¸ 45
In Gradian angle mode:
tanê (1) ¸ 50
In Radian angle mode:
tanê ({0,.2,.5}) ¸
{0 .197
... .463...}
tanê( 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:
tanê([1,5,3;4,2,1;6,ë2,1]) ¸






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)}
tanh( squareMatrix1 ) ⇒
⇒⇒
⇒ squareMatrix
Returns the matrix hyperbolic tangent of
squareMatrix1 . This is not the same as calculating
the hyperbolic 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:
tanh([1,5,3;4,2,1;6,ë2,1]) ¸






ë.097… .933… .425…
.488… .538…
ë.129…
1.282…
ë 1.034… .428…

Texas Instruments Titanium TI-89 Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
Memory	188 KB RAM, 2.7 MB Flash ROM
Type	Graphing Calculator
Display	Monochrome
Processor	Motorola 68000
Processor Speed	12 MHz
Power Source	4 AAA batteries
Connectivity	USB
Programming	TI-BASIC, Assembly
Operating System	AMS (Advanced Mathematics Software)