Plot graphs of the following harmonic oscillations: S1(t) = 2cosw1t, S2(t) = cos(wt +), S3 = 3cos(wt +), w1 = 200p rad/s, w = 100p rad/s. Draw the oscillatory processes S1(t), S2(t) and S3(t) as vectors. Find the complex amplitude of these oscillations. Find the amplitude and initial phase of the oscillation that is the sum of oscillations S2 and S3.
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