sinusoidal function review. in the first portions of the lab, we will be doing a fourier analysis of the eeg signals you record. to better be able to interpret the results, please review your knowledge of sine waves, and then consider the following function: a) what is the amplitude of this sinusoidal function? b) what is the frequency of this sinusoidal function in hz? c) what is the phase of this sinusoidal function relative to a pure sine wave (for this question, denote phase lags as positive and phase leads as negative, and express your answer either in degrees or radians)?