ASIN - Arcsine

The ASIN function returns a numeric value in radians that approximates the arcsine of argument-1.
The type of this function is numeric.

Format

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FUNCTION ASIN (argument-1)

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Arguments

1. argument-1 must be class "numeric".

2. The value of argument-1 must be greater than or equal to -1 and less than or equal to +1.

Returned values

1. The returned value is the approximation of the arcsine of argument-1 and is greater than or equal to -pi/2 and less than or equal to +pi/2.

2. The error default value is -2.

See also:        SIN, COS, ACOS, TAN, ATAN

Example 9-3

...
DATA DIVISION.
WORKING-STORAGE SECTION.
01  AN PIC S9V999 VALUE -0.45.
01  R PIC 9V99.
01  RES PIC -9.99.
PROCEDURE DIVISION.
P1 SECTION.
MAIN.
    COMPUTE R = FUNCTION ASIN (AN).
    MOVE R TO RES.
    DISPLAY RES UPON T.
    STOP RUN.

Result:               0.46