21.2. Algebra
Listed below are the algebraic keys and functions available in the app.
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Symbols/Keys
Buttons i
Re
Im
conj
arg
/x/
//v//
/A/
tr
A^T
adj
x^
x'
x''
x'''
x''''
.
,
ln
log
log2
log [n]
[x, y]
sgn
[ [x1, x2, x3, ...] [y1, y2, y3, ...]...]
[ ]^ (–1)
A, B, C, D, E, F
y =
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Meaning/Functions
Uses/Codes Imaginary number key (used to key in complex numbers)
Real number key (used to identify the real number part of a complex number)
Imaginary (used to identify the imaginary number part of a complex
number and to plot the imaginary part of a function) Conjugate (used to find the conjugate of a number)
Argument (used to find the measurement of an angle that describes the
direction of the complex number on the complex plane) Absolute value key (used to calculate the absolute value of a number)
Norm key (used to calculate the length of a vector)
Determinant key (used to find the value associated in a matrix)
Matrix Trace (used to find the sum of diagonal elements)
Transpose (used to convert the rows into columns or vice versa and to convert vectors into a
one-column matrix) Adjugate matrix (used to replace each element of a matrix by its cofactor)
Exponent key (used to enter exponents)
First derivative key (tap the exponent key twice)
Second derivative key (tap the exponent key three times)
Seconds key (used to enter seconds - the fractional part of a minute as an angle measure) Third derivative key (tap the exponent key twice, pause, then tap it three times)
Fourth derivative key (tap the exponent key three times, pause, then tap it three times again)
Cube root key (used to enter radicals with an index of 3)
Fourth root key (used to enter radicals with index 4)
Decimal point key (used to enter decimal numbers)
Comma key (used to separate elements of a matrix and ordered pairs) Natural logarithm (used to enter logarithms with base e)
Common logarithm (used to enter logarithms with base 10)
Other logarithms (used to enter logarithms with base n)
Ordered pair (used to enter or plot points)
Sign or signum function (used to determine the sign of a number)
Matrix entries (used to enter a matrix - elements in a row are enclosed in square brackets)
Inverse of a matrix (used to find the inverse of a square matrix with a non-zero determinant)
Uppercase keys in math keyboard (used as matrix names - also used to convert hexadecimal
Used to enter functions in Graph mode
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