已知非正弦电路的u=100+20sin(100t+45°）+10sin(300t+55°)V，i=3+sin(100t—15°）

已知非正弦电路的u=100+20sin(100t+45°）+10sin(300t+55°)V，i=3+sin(100t—15°）+sin(200t+10°）A，则P=( )。

A.310W

B.320W

C.315W

D.300W

正确答案是A