Question: The function for a current is I(t) = 9 cos(120 pi t)where I is the current, in amperes, and t is the time in seconds.

The function for a current is I(t) = 9 cos(120 pi t)where I is the current, in amperes, and t is the time in seconds. a) Find the current when t=6 s. b) The electromotive force, E(t), in a circuit, is given in volts by finding the first derivative of the current function I(t). c) Determine the electromotive force when t=3 d) Find the maximum and minmum electromotive force and the time that they cccur

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