arg的值怎么算 arg-1等于多少? 2021-03-15 1867 arg-1等于多少?因?yàn)?1-I=√2(cos5π/4 isin5π/4),Arg(-1-I)=5π/4 arg-1等于多少?因?yàn)?1-I=√2(cos5π/4 isin5π/4),Arg(-1-I)=5π/4