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设i是虚数单位，复数z=tan45°-isin60°，则z2等于（）A．B．iC．iD．
题目详情
设i是虚数单位，复数z=tan45°-isin60°，则z2等于（ ）
A．
B．
i
C．
i
D．
A．
B．
iC．
iD．
▼优质解答
答案和解析
复数z化为为a+bi（a，b∈R）的形式，然后求z2按多项式乘方运算法则展开，化简即可．
【解析】
，
∴
．
故选B．
【解析】
，∴
．故选B．
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