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复数z=-3(cos-isin(i是虚数单位)的三角形式是……( )A.3[cos
复数z=-3(cos-isin(i是虚数单位)的三角形式是……( )A.3[cos
复数
z
=-3(cos
-isin
(i是虚数单位)的三角形式是……( )
A.3[cos(-
)+isin(-
)]
B.3(cos
+isin
)
C.3(cos
+isin
)
D.3(cos
-isin
)
答案
C
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