From
Figure 1.1
, we have
=window.open('figures/fig-1.1.gif','SHM','width=600,height=300')){kind=link}
where x is the displacement and 
is the circular frequency in rad/sec.
where T is the period (sec) and f is the frequency (cycle/sec) of the harmonic motion.
-
The SHM repeats itself in
radians.