The system function MathLib.asin returns the arcsine of a number that is in the range of -1 to 1. The result is in radians and is in the range of -pi/2 to pi/2.
MathLib.asin(numericField mathLibNumber in) returns (result mathLibTypeDependentResult)
result = MathLib.asin(myItem);
Related concepts
Syntax diagram for EGL functions
Related reference
EGL library MathLib