question_answer

Vibrations of rope tied by two rigid ends shown by equation \[y=\cos 2\pi t\,\,\sin 2\pi x,\] then minimum length of the rope will be

A)  \[1\,m\]                

B)         \[\frac{1}{2}\,m\]

C)  \[5\,m\]                

D)         \[2\,\pi m\]