A system with transfer function \(\frac{{Y\left( s \right)}}{{X\left( s \right)}} = \frac{s}{{s + p}}\) has an output \(y\left( t \right) = cos\left( {2t - \frac{\pi }{3}} \right)\)for the input signal \(x\left( t \right) = p\cos \left( {2t - \frac{\pi }{2}} \right)\). Then, the system parameter p is

A system with transfer function \(\frac{{Y\left( s \right)}}{{X\left(

1.	A system with transfer function \(\frac{{Y\left( s \right)}}{{X\left( s \right)}} = \frac{s}{{s + p}}\) has an output \(y\left( t \right) = cos\left( {2t - \frac{\pi }{3}} \right)\)for the input signal \(x\left( t \right) = p\cos \left( {2t - \frac{\pi }{2}} \right)\). Then, the system parameter p is
A.	√3
B.	2 / √3
C.	1
D.	√3 / 2
Answer» C. 1