R.M.S value of the sinusoidal waveform q(t)=2.11cos(87.25t+78π÷478.23).

R.M.S value of the sinusoidal waveform q(t)=2.11cos(87.25t+78π÷478.23). Correct Answer 1.49 V

R.M.S value of the sinusoidal waveform is Vm÷2½ and r.m.s value of the trapezoidal waveform is Vm÷3½. The peak value of the sinusoidal waveform is Vm. The r.m.s value is Vrms = 2.11÷2½ = 1.49 V.
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