The damping ratio of a pair of complex poles when expressed in terms of angle Œ∏ measured from jœâ axis equal to

The damping ratio of a pair of complex poles when expressed in terms o

1.	The damping ratio of a pair of complex poles when expressed in terms of angle Œ∏ measured from jœâ axis equal to
A.	sin Œ∏
B.	cos Œ∏
C.	tan Œ∏
D.	cot Œ∏
Answer» B. cos Œ∏