A signal cos(2p fmt) modulates a carrier cos(2p fct) using the double-sideband-with-carrier (DSBWC) scheme to yield a modulated signal cos(2p fct) + 0.3cos(2p fmt)

Q. A signal cos(2p fmt) modulates a carrier cos(2p fct) using the double-sideband-with-carrier (DSBWC) scheme to yield a modulated signal cos(2p fct) + 0.3cos(2p fmt) cos(2p fct) . The modulation index is___________.(Answer should be rounded off to one decimal place)     .

Sol:

The standard equation of AM is