MCQ Practice Question Signals & SystemsSignal Classification A signal x(t) is even if it satisfies? Ax(-t)=x(t) Bx(-t)=-x(t) Cx(t+T)=0 Dx(t)=delta(t) only Show AnswerHide AnswerReport an error Correct Answer: A. x(-t)=x(t) Explanation: An even signal is symmetric about the vertical axis and obeys x(-t)=x(t).Reference: Standard signals and systems: signal classification