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This is documentation for Caché & Ensemble.

For information on converting to InterSystems IRIS, see the InterSystems IRIS Adoption Guide and the InterSystems IRIS In-Place Conversion Guide, both available on the WRC Distributions page (login required).

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Returns the arc-sine of an angle.




number An expression that resolves to a number or numeric string in the range -1 to 1 (inclusive). Values outside of this range generate an <ILLEGAL VALUE> error.


The ASIN function returns the trigonometric arc-sine of number. An arc-sine is the inverse of a sine.

By default, Caché MVBasic trig functions return results in degrees. To return results in radians, set $OPTIONS RADIANS.

To convert degrees to radians, multiply degrees by pi/180. To convert radians to degrees, multiply radians by 180/pi.


The following example uses the ASIN function to return the arc-sine of an angle:

PRINT ASIN(-0.5):" in radians"
PRINT ASIN(-0.5)*(180/ACOS(-1)):" in degrees"
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