|val||The angle (in degrees) to return the inverse sine of.|
Returns the inverse sine of x, in that if dsin(x)=n,
darcsin(n)=x, and the resulting number will be between -90 and
NOTE: This will only accept a number between -1 and 1 (anything else will throw an error).
val = darcsin(-1);
This will set "val" to -90.