问题
填空题
复数(12+5i)2(239-i)的辐角主值是______.
答案
z的辐角主值
argz=arg[(12+5i)2(239-i)]
=arg[(119+120i)(239-i)]
=arg[28561+28561i]=
.π 4
复数(12+5i)2(239-i)的辐角主值是______.
z的辐角主值
argz=arg[(12+5i)2(239-i)]
=arg[(119+120i)(239-i)]
=arg[28561+28561i]=
.π 4