>>> from sinusoidal import sinusoidal1

>>> round(sinusoidal1(9), 2)
-19.02
>>> round(sinusoidal1(10),2)
-21.44
>>> round(sinusoidal1(100),2)
-280.47
>>> round(sinusoidal1(345),2)
-975.5
>>> round(sinusoidal1(1000),2)
-2837.07
>>> round(sinusoidal1(2674),2)
-7561.88
>>> round(sinusoidal1(1000000),2)
-2830726.31