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Signals and systems electrical engineering miscellaneous

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Signals and systems electrical engineering miscellaneous
  1. X[k] is shown in the figure below
    1. 2cos
      6π
      		n -
      π
      72
    2. 2sin
      6π
      		n -
      π
      72
    3. 2cos
      6π
      		n +
      π
      72
    4. 2sin
      6π
      		n +
      π
      72
Correct Option: A


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