sin(?π3)+2sin4π3+3sin2π3

发布时间：2021-02-19 21:17:16

sin(?π3)+2sin4π3+3sin2π3

网友回答

sin(?π3)+2sin4π3+3sin2π3
======以下答案可供参考======
供参考答案1:
=-根号2+2*-根号2+3根号2=0
供参考答案2:
sin(-π/3)+2sin4/3π+3sin2/3π
=-sin(π/3)-2sin(π/3)+3sin(π/3)
=0选c供参考答案3:
c
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