HP -22S Owner's Manual page 82

General Math Functions (Continued)
Function Description Typing Aid
SQRT(x)
Vx.
[E)
TAN(x) Tangent.*
ITANI
TANH(x)
Hyperbolic tangent.
.1
HYP IITAN I
O(x:y)
o polar coordinate for (x,y) rectangular
coordinates. *t
.1
ANGLE I
x(r:O) x-coordinate of polar coordinates.*t
.1 xCOORO
I
y(r:O) v-coordinate of polar coordinates. *t
.lyCOOROI
• Uses the current angular mode-Degrees or Radians.
t
The function does
not
use the coordinate conversion registers.
Statistical Functions·
Function Description Typing Aid
b v-intercept of the line calcu-
I
STAT
I
{loR. }
{b}
lated by linear regression.
m Slope of the line calculated by
I
STAT
I
{loR. }
{m}
linear regression.
n Number of x entries or num-
I
STAT
I
{X}
{n}
ber of x,y-pairs.
r Correlation coefficient be-
I
STAT
I
{loR. } {r}
tween the data and the line
calculated by linear regres-
sion.
sx Standard deviation of the x-
I
STAT
I
{s} {s,,}
values.
sy Standard deviation of the
y-
I
STAT
I
{s} {Sy}
values.
~x
Sum of the x-values.
I
STAT
I
{X}
{,,}
~x2
Sum of the squares of the x-
I
STAT
I
{X}
{,,2}
values.
~xy Sum of the products of the x-
I
STAT
I
{X}
{"Y}
and y-values .
• The statistical functions use the data stored in the statistical registers.
82 6: Evaluating and Solving Equations