But then, I had an epiphany—in an RCL circuit with alternating current, the current reaches a maximum value only at the resonance frequency. At the resonance frequency, the inductive reactance is equal to the capacitive reactance, which means that the total impedance of the circuit is just the resistance of the resistor. This also means that the phase angle between the current and the voltage is zero degrees. After all this became clear, the problem was rather simple…
At least maybe I’m actually learning something? Speaking of which, Calculus II test tomorrow…