Which of the following function is periodic?

Which of the following functions is periodic?

Which of the following functions is periodic?

Which of the following functions is periodic? a) x-[x] b) sin(1/x) c) xcos(x) d) None of these

Which of the following functions is periodic? a) f(x)=x-[x].where [x] denote the greatest integer <=real number b) f(x)=sin(1/x) for x not=0 f(x)=0 c) f(x)=xcosx d) none of the above

Which of the following functions is periodic ?

Which of the following function is a periodic function ?f(x)=sin((1)/(x));x!=0