If the frequency of the sine wave matches one of the bins then you should get a strong signal in that bin and little or no signal in the other bins. If the frequency is between bins you should get signals in the two bins on either side.
If the frequency of the sine wave matches one of the bins then you should get a strong signal in that bin and little or no signal in the other bins. If the frequency is between bins you should get signals in the two bins on either side.