A partilcle moves according to the law x = a cos""(pi t)/(2). The distance covered by it in the time interval between t = 0 to t =3 sec is

A partilcle moves according to the law x = a cos""(pi t)/(2). The dist

1.	A partilcle moves according to the law x = a cos""(pi t)/(2). The distance covered by it in the time interval between t = 0 to t =3 sec is
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