Texas Instruments NS/CLM/1L1/B Reference Guide - Page 75

Matrix1, matrix, Value1, value, List1

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rref( ) rref(Matrix1[, Tol]) ⇒ matrix Returns the reduced row echelon form of Matrix1. Catalog > Optionally, any matrix element is treated as zero if its absolute value is less than Tol. This tolerance is used only if the matrix has floatingpoint entries and does not contain any symbolic variables that have not been assigned a value. Otherwise, Tol is ignored. /· • If you use or set the Auto or Approximate mode to Approximate, computations are done using floatingpoint arithmetic. • If Tol is omitted or not used, the default tolerance is calculated as: 5Eë14 ·max(dim(Matrix1)) ·rowNorm(Matrix1) Note: See also ref(), page 66. S sec() sec(Value1) ⇒ value sec(List1) ⇒ list In Degree angle mode: Returns the secant of Value1 or returns a list containing the secants of all elements in List1. Note: The argument is interpreted as a degree, gradian or radian angle, according to the current angle mode setting. You can use ó, G, orôto override the angle mode temporarily. sec/() sec/(Value1) ⇒ value sec/(List1) ⇒ list In Degree angle mode: Returns the angle whose secant is Value1 or returns a list containing the inverse secants 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 Gradian angle mode: In Radian angle mode: sech() sech(Value1) ⇒ value sech(List1) ⇒ list Returns the hyperbolic secant of Value1 or returns a list containing the hyperbolic secants of the List1 elements. TI-Nspire™ Reference Guide Catalog > Catalog > Catalog > 69

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TI-Nspire™ Reference Guide
69
S
rref()
Catalog >
rref(
Matrix1
[
,
Tol
]
)
⇒
matrix
Returns the reduced row echelon form of
Matrix1
.
Optionally, any matrix element is treated as zero if its absolute value
is less than
Tol
. This tolerance is used only if the matrix has floating-
point entries and does not contain any symbolic variables that have
not been assigned a value. Otherwise,
Tol
is ignored.
•
If you use
/·
or set the
Auto or Approximate
mode to Approximate, computations are done using floating-
point arithmetic.
•
If
Tol
is omitted or not used, the default tolerance is calculated
as:
5E
ë
14
·
max(dim(
Matrix1
))
·
rowNorm(
Matrix1
)
Note:
See also
ref()
, page 66.
sec()
Catalog >
sec(
Value1
)
⇒
value
sec(
List1
)
⇒
list
Returns the secant of
Value1
or returns a list containing the secants
of all elements in
List1
.
Note:
The argument is interpreted as a degree, gradian or radian
angle, according to the current angle mode setting. You can use
ó
,
G
,
or
ô
to override the angle mode temporarily.
In Degree angle mode:
sec
/
()
Catalog >
sec
/
(
Value1
)
⇒
value
sec
/
(
List1
)
⇒
list
Returns the angle whose secant is
Value1
or returns a list containing
the inverse secants 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:
In Gradian angle mode:
In Radian angle mode:
sech()
Catalog >
sech(
Value1
)
⇒
value
sech(
List1
)
⇒
list
Returns the hyperbolic secant of
Value1
or returns a list containing
the hyperbolic secants of the
List1
elements.