Identify the mathematical expression for amplitude

Question:

Identify the mathematical expression for amplitude modulated wave:

(a) Ac sin [{ωc + k1vm(t)}t + φ ]

(b) Ac sin {ωc t + φ + k2 vm(t)}

(c) {Ac + k2 vm(t)} sin (ωc t + φ )

(d) Ac vm(t) sin (ωc t + φ )

Solution:

(c) {Ac + k2 vm(t)} sin (ωc t + φ )

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