A) \[\frac{\pi }{2}\]
B) \[-\frac{\pi }{2}\]
C) \[\pi \]
D) \[0\]
Correct Answer: A
Solution :
\[x=A\,\,\cos \,(\omega t+\phi )\] Let \[t=0,\,\,\,\,x=0\] \[0=\cos \phi \] \[\cos \frac{\pi }{2}=\cos \phi \] \[\theta =\frac{\pi }{2}\]You need to login to perform this action.
You will be redirected in
3 sec