HP 39gs Graphing Calculator Instrukcja Użytkownika Pobierz pdf (Strona 168)

100

101

13-16 Using mathematical functions

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))

Examples

SIGN (–2) returns –1

SIGN((3,4)) returns (.6,.8)

TRUNCATE Truncates value to decimal places. Accepts complex

numbers.

TRUNCATE(value, places)

Example

TRUNCATE(2.3678,2) returns 2.36

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