A rigid flywheel with rotational inertia \(I\) is mounted on a frictionless central axle and is initially at rest at time \(t = 0\). A time-dependent torque \(\tau(t) = \tau_0 \cos(\omega_0 t)\) is applied to the flywheel, where \(\tau_0\) and \(\omega_0\) are positive constants. Which of the following expressions gives the instantaneous power \(P(t)\) delivered to the flywheel as a function of time \(t\)?