A string is rigidly tied at two ends and its equation of vibrationis given by y=cos 2pix. Then minimum length of string is

A string is rigidly tied at two ends and its equation of vibrationis g

1.	A string is rigidly tied at two ends and its equation of vibrationis given by y=cos 2pix. Then minimum length of string is
Answer» 1m `1/2 M` 5M `2 PI M` ANSWER :B