The electromotive force, V (Volts), applied to an AC circuit at time, t (seconds), for t ? 0…

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The electromotive force, V (Volts), applied to an AC circuit at time, t (seconds), for t ? 0 is defined by the trigonometric waveform: V t = – + + sin(2 1) 4sin(2 3) t i) Express this waveform, representing the electromotive force, as a simpler trigonometric waveform using: V A t = + cos( ) ? ? with ? ? 0 . (2 marks) ii) Find the maximum electromotive force applied to the circuit and then calculate the first time that this is reached once the AC circuit begins operation.

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