己知电压μ=5sin(ωt+10°)V,电流i=3sin(ωt+75°)A,则μ滞后i

己知电压μ=5sin(ωt+10°)V,电流i=3sin(ωt+75°)A,则μ滞后i
A、85°
B、65°
C、-65°
D、-85°
【正确答案】:B