y (t) = c o s (ω_{k} t) + \frac{1}{2} c o s ((ω_{m} + ω_{k}) t) + \frac{1}{2} c o s ((ω_{m} + ω_{k}) t)

${y(t) = cos(\omega_kt) + \frac {1} {2} cos (( \omega_m + \omega_k)t) + \frac {1} {2} cos (( \omega_m + \omega_k)t)}$

Error