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The signal cos(10πt + π4) is ideally sampled at a sampling frequency of 15 Hz. The sampled signal is passed through a filter with impulse response (sin(πt)πt)cos(40πt − π2). The filter output is
A
152cos(40πt − π4)
B
152(sin(πt)πt)cos(10πt + π4)
C
152cos(10πt − π4)
D
152(sin(πt)πt)cos(40πt − π2)

Explanation

Correct : c

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