cool9194 cool9194 07-02-2024 Physics contestada The instantaneous frequency of the signal x(t) = 10 cos (100sin(4πt) + 1000πt + 0.3π) in Hz is given bya. fi(t)=500b. fi(t)=500+100sin(4πt)c. fi(t)=500+400πcos(4πt)d. fi(t) = 500 + 200 cos (4πt)