The phase margin (in degrees) of a system having the loop transfer function (mathrm{G}(s) mathrm{H}(s)=frac{2 sqrt{3}}{s(s+1)}) is
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The phase margin (in degrees) of a system having the loop transfer function \(\mathrm{G}(s) \mathrm{H}(s)=\frac{2 \sqrt{3}}{s(s+1)}\) is
(a) 45
(b) -30
(c) 60
(d) 30
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