已知电流i= 4√2sin(314t+90°)A,则此正弦电流的周期为( )

已知电流i= 4√2sin(314t+90°)A,则此正弦电流的周期为( )

A.50S 

B.314S 

C.0.02S 

D.0.05S

正确答案是C