For a second order system with 0 < Œæ < 1, the angle which poles make with negative real axis is

For a second order system with 0 < Œæ < 1, the angle which poles mak

1.	For a second order system with 0 < Œæ < 1, the angle which poles make with negative real axis is
A.	sin-1 Œæ
B.	cos-1 Œæ
C.	tan-1 Œæ
D.	cot-1 Œæ
Answer» C. tan-1 Œæ