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OpenStudy (anonymous):
an oscilloscope hooked up to an alternating current (AC) circuit shows a sine curve. the device records the current in amperes (A) on the vertical axis and the time in seconds on the horizontal axis. at t= 0s, the current reads its maximum value of 4.5 A. At t = 1/120s, the current reads its first minimum value of -4.5 A. determine the equation of the function that expresses the current in terms of time.
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OpenStudy (anonymous):
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