What is the result when two sinusoidal waves of identical frequency but differing amplitudes and phase angles are subtracted?

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A sinusoidal wave maintaining the original frequencyA sinusoidal wave with half the initial frequencyA sinusoidal wave with twice the initial frequencyA waveform that is not sinusoidalZero or no signal

Explanation

Subtracting two sinusoids that share the same frequency but differ in amplitude and phase still produces a sinusoid of that same frequency. The amplitude and phase of the resulting wave change, but the frequency remains constant.