1. (TCO 1) A signal that is a function of time has the following properties (or

Question

1. (TCO 1) A signal that is a function of time has the following properties (or the following applies to it). (Points : 4)        It must always display an even symmetry.
       It must always display an odd symmetry.
       It may be periodic or aperiodic.
       It always originates from an electrical system.

Question 2. 2. (TCO 1) A sinusoidal signal, 20 sin(?t + ?/2 ), passing through an LTI system, undergoes a gain of 2 and a 90-degree phase lag. The resulting output signal will be mathematically described as (Points : 4)        22 sin(?t + ?/2).
       40 sin(?t ).
       10 sin(?t + ?/2).
       40 sin(?t

Explanation / Answer

answer 1,1) It may be periodic or aperiodic.

answer 2,2) 40 sin(?t

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