import math


def test3(x, sin=math.sin):
    """
    >>> test3(3)
    0.1411200080598672

    >>> import dis
    >>> dis.dis(test3)
     53           0 LOAD_FAST                1 (sin)
                  3 LOAD_FAST                0 (x)
                  6 CALL_FUNCTION            1 (1 positional, 0 keyword pair)
                  9 RETURN_VALUE
    """
    return sin(x)