Ref - Texas Instruments TI-Nspire Reference Manual

4
Rect
complexValue 4
Rect
Displays complexValue in rectangular form a+bi. The complexValue
can have any complex form. However, an re
Degree angle mode.
You must use parentheses for an (r
Note:

ref()

⇒
Matrix1 Tol matrix
ref( [, ])
Returns the 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
mode to Approximate, computations are done using floating-
point arithmetic.
If Tol is omitted or not used, the default tolerance is calculated
•
as:
L
14 ·max(dim(Matrix1)) ·rowNorm(Matrix1)
5E
Avoid undefined elements in Matrix1. They can lead to unexpected
results.
For example, if a is undefined in the following expression, a warning
message appears and the result is shown as:
The warning appears because the generalized element 1/a would not
be valid for a=0.
You can avoid this by storing a value to a beforehand or by using the
"|" substitution mechanism, as shown in the following example.
See also rref(), page 87.
Note:
82 TI-Nspire™ Reference Guide
iq
entry causes an error in
±q
) polar entry.
or set the
Auto or Approximate
In Radian angle mode:
In Gradian angle mode:
In Degree angle mode:
±
To type , select it from the symbol list in the Catalog.
Note:
Catalog >
Catalog >