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Q#1 Fourier Transform GATE EE 2016 MCQ +2 marks -0.66 marks

The output of a continuous-time, linear time-invariant system is denoted by  where x(t) is the input signal. A signal z(t) is called Eigen-signal of the system T, when , where  is a complex number, in general and is called an Eigen value of T. Suppose the impulse response of the system T is real and even. Which of the following statements is TRUE?

cos(t) is an Eigen-signal but sin(t) is not

cos(t) and sin(t) are both Eigen-signals but with different Eigen values

sin(t) is an Eigen-signal but cos(t) is not

cos(t) and sin(t) are both Eigen-signals with identical Eigen values

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