Choose the correct graph vtt versus time for the circuit sho

Choose the correct graph v_t(t) versus time for the circuit shown in the figure. The op amp is ideal. (Figure 1)

Solution

given Vin(t) is not clear due smaller image. But here only two cases are exist. That are sin wave input or cos wave input . If given wave in sine wave the option A is correct. Because at t=0, Vin(t)=0 and at t=0.5, Vin(t) is maximum. If given wave is cosine wave the option D is correct. Because at t=0, Vin(t) is maximum and at t=0.5, Vin(t)=0.