Casio fx-82AU PLUS - Function Calculations; Trigonometric and Hyperbolic Functions; Exponential, Logarithmic, and Power Functions; Statistical and Special Functions

E-13
Function Calculations
For actual operations using each function, see the “Examples” section
following the list below.

: P is displayed as 3.141592654, but P = 3.14159265358980 is used for
internal calculations.
e : e is displayed as 2.718281828, but e = 2.71828182845904 is used for
internal calculations.
sin, cos, tan, sin
−1
, cos
−1
, tan
−1
: Trigonometric functions. Specify the angle
unit before performing calculations. See
1
.
sinh, cosh, tanh, sinh
−1
, cosh
−1
, tanh
−1
: Hyperbolic functions. Input a
function from the menu that appears when you press E. The angle unit
setting does not affect calculations. See
2
.
°,
r
,
g
: These functions specify the angle unit. ° specifies degrees,
r
radians,
and
g
grads. Input a function from the menu that appears when you perform
the following key operation: (DRG). See
3
.
,  : Exponential functions. Note that the input method is different
depending upon whether you are using Natural Display or Linear Display.
See
4
.
log
: Logarithmic function. See
5
.
ln
: Natural logarithm to base e. See
6
.
x
2
, x
3
, x9, , , , x
−1
: Powers, power roots, and reciprocals. Note
that the input methods for
x9, , , andand  are different depending uponare different depending upon
whether you are using Natural Display or Linear Display. See
7
.
Note: The following functions cannot be input in consecutive sequence:
x
2
,
x
3
, x9, x
−1
. If you input 277, for example, the final 7 will be ignored. To
input
2
2
2
, input 27, press the B key, and then press 7().
Pol, Rec : Pol converts rectangular coordinates to polar coordinates, while
Rec converts polar coordinates to rectangular coordinates. See
8
.
Pol(x, y) = (r, θ) Rec(r, θ) = (x, y)
Rectangular Polar
Coordinates (Rec) Coordinates (Pol)
Specify the angle unit before
performing calculations.
The calculation result for
r and θ
and for
x and y are each assigned
respectively to variables X and Y.
Calculation result
Q is displayed
in the range of −180° 
Q  
180°.
x ! : Factorial function. See
9
.
Abs : Absolute value function. Note that the input method is different
depending upon whether you are using Natural Display or Linear Display.
See
10
.
Ran# : Generates a 3-digit pseudo random number that is less than 1. The
result is displayed as a fraction when Natural Display is selected. See
11
.
RanInt# : For input of the function of the form RanInt#(
a, b), which generates
a random integer within the range of
a to b. See
12
.
nPr, nCr : Permutation (nPr) and combination (nCr) functions. See
13
.