(args)
return _call_float_function(math.atan, x)
Inverse tangent.
Inverse tangent.
Inverse tangent .
def atn_(args):
    """Inverse tangent."""
    x, = args
    return _call_float_function(math.atan, x)
def atn_ ( args ) : x , = args return _call_float_function ( math . atan , x )