\magnification=\magstep1

$$
\eqalign{
s_1(t) \quad &= \quad A_1 \thinspace \cos(\omega_1 t + \phi_1) \cr
s_2(t) \quad &= \quad A_2 \thinspace \cos(\omega_2 t + \phi_2) \cr
}
$$



\bye
