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Consider the following voltages v1(t) and v2(t):
v1(t) = 2 + 3 cos 200t+ 4 cos(200t – 90°) V
v2(t) = 2 + 3 cos 200t + 4 cos (210t – 120°) V
The ratio of RMS values of v1(t) and v2(t) is equal to________.
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