已知z=-2/(1+3i),求argz

题目详情

已知z=-2/(1+3i),求argz

▼优质解答

答案和解析

已知z=-2/(1+3i)=-2(1-3i)/(1+3i)(1-3i)=-2(1-3i)/(1+9)=(-1+3i)/5
所以argz=π+arctan(-3)=π-arctan3

看了已知z=-2/(1+3i),求...的网友还看了以下：