The enough affliction is that every one the elements of the very first column of the Routh array must have the identical indication. This means that all The weather of the 1st column with the Routh array need to be possibly favourable or adverse. The stage of your output sinusoidal https://local.google.com/place?id=8622223340300826478&use=posts&lpsid=CIHM0ogKEICAgICO5LWcwgE