河南成教 / 高等数学(工专)
正确率:100%
4、复数z=6i的三角形式为:
A. cosπ/2 isinπ/2
B. cosπ/2-sinπ/2
C. sinπ/2 icosπ/2
D. sinπ/2-icosπ/2
A. cosπ/2 isinπ/2
B. cosπ/2-sinπ/2
C. sinπ/2 icosπ/2
D. sinπ/2-icosπ/2
参考答案: