arcsin

Definition: atom x2 = arcsin(atom x1)
Description: Return an angle with sine equal to x1.
Comments: The argument, x1, must be in the range -1 to +1 inclusive.

A value between -PI/2 and +PI/2 (radians) will be returned.

This function may be applied to an atom or sq_arcsin() to all elements of a sequence. The rules for sequence operations apply.

arcsin() is not as fast as arctan().
Example:
s = arcsin(1)
-- s is 1.570796327
See Also: sin, arccos, arctan