ASIN

ASIN is a CAOS function equivalent to the mathematical arcsine.

Usage
Syntax: ASIN s (float)

Returns, as a float in degrees, the arcsine of s, i.e. the angle whose sine is s. It is the inverse of SIN_.

Domain and range
s must be between -1 and 1. Calling ASIN with values outside this domain will return NaN, which is a special float value. ASIN returns a value between -90 and 90.