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A continuous-time system, with time t in seconds (s), input f(t), and output y(t), is specified...

A continuous-time system, with time t in seconds (s), input f(t), and output y(t), is specified by the equations:

y(t) = f(sin(t)) y(t) = f(cos(t))

a) are these systems causal? Justify your answer.

b) are these systems linear? Clearly show and explain your work

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