" Which of the following function is non-periodic? "

Which of the following functions is non-periodic?

Which of the following functions is non-periodic?

Which of the following functions is non-periodic? (1) 2^x/2^[x]= (2) sin^(-1)({x}) (3) sin^(-1)(sqrt(cosx)) (4) sin^(-1)(cos x^2)

Which of the following function is/are periodic?

Which of the following functions is not periodic ?

Which of the following functions is periodic?

Which of the following function is periodic?