如图，us(t)=[2+10sin(5t)]V，iS(t)=2sin10t A。求稳态电压响应u(t)。
A、u(t)=2sin(10t-90°) V
B、u(t)=2+20sin(5t-90°)+4sin(10t-90°) V
C、u(t)=2+2.36sin(5t+135°)+2sin(10t+90°) V
D、u(t)=2+9.43sin(5t-45°)+2sin(10t-90°) V
E、以上都不对