HP 40gs, User Manual

Page: 170 / 444

13-16 Using mathematical functions
Example
9 MOD 4 returns 1
%
x
percent of
y
; that is,
x /100* y
.
% ( x , y )
Example
% (20,50) returns 10
%CHANGE
Percent change from x to y , that is,
100( y–x )/ x
.
%
CHANGE
(
x , y
)
Example
%
CHANGE(20,50)
returns
150
%TOTAL
Percent total : (100) y/
x
. What percentage of
x ,
is y .
% TOTAL (
x , y
)
Example
% TOTAL(20,50) returns 250
RAD
→
DEG
Radians to degrees. Converts value from radians to
degrees.
RAD
→
DEG ( value )
Example
RAD
→
DEG(
π
) returns 180
ROUND
Rounds value to decimal places . Accepts complex
numbers.
ROUND ( value , places )
Round can also round to a number of significant digits as
showed in example 2.
Examples
ROUND(7.8676,2) returns 7.87
ROUND (0.0036757,-3) returns 0.00368
SIGN
Sign of value . If positive, the result is 1. If negative, –1. If
zero, result is zero. For a complex number, this is the unit
vector in the direction of the number.
SIGN ( value )
SIGN ((
x, y
))
hp40g+.book Page 16 Friday, December 9, 2005 1:03 AM