Question: The sinusoid x(t) =6cos10?t is sampled at the rate of 15 Hz and applied to ideal rectangular LPF with cut-off frequency of 10 Hz, then the output of filter contains:

Options

A : Only 10? rad/sec component

B : 10? rad/sec component

C : 10? rad/sec and 20? rad/sec components

D : +10? rad/sec and +20? rad/sec components

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