That is indeed the right answer, for
n=6, you have twelve nodal points if you think of it conceptually,
when as in a regular sin or cos function,
the period is divided by six causing the graph to split into twelve
cycles. -> return to the
questions page
Congratulations 
as in a regular sin or cos function,
the period is divided by six causing the graph to split into twelve
cycles. -> return to the
questions page