Consider that the signal v(t) 10 cos(100t - 100) volts represents the voltage across the terminals of a resistor and the current through the resistor is given by i(t) = cos(100t - 100) amps.
1. What is the instantaneous power consumed by the resistor?
2. Is the instantaneous power periodic?
3. If the instantaneous power signal is periodic, what is the period?