I know that in general the sampling rate, $f_s$, must be greater than twice the highest frequency of the signal, $f$.
If I sample at the Nyquist rate, it can lead to the following:
However, if the signal is sampled only at maxima and minima, then we get this:
My signal is not pure sinusoidal, it is something like this:
Will I loose any frequency components if I sample it at the Nyquist rate?