RETURN VALUES
The asin and the asinf functions return the arc sine in the range
.Bk -words [-pi/2, +pi/2]
.Ek radians. If:
| x | > 1
asin x raises an invalid exception and returns an NaN.
SEE ALSO
acos(3), atan(3), atan2(3), cos(3), cosh(3), fenv(3), math(3), sin(3), sinh(3), tan(3), tanh(3)
STANDARDS