Consider the root locus for a unity-gain negative

feedback system having the characteristic equation 

, where k denotes the compensator

gain of

the forward path transfer function. 

Let theta_dep

(in degrees) be the

value of the angle of departure of the root locus branch starting from the pole at 

The value of theta_dep (in degrees) = 

Note: Write your answer such that 0 <= theta_dep<= 360 (degrees).