复数-cosπ/7-isinπ/7的辐角主值是

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复数-cosπ/7-isinπ/7的辐角主值是复数-cosπ/7-isinπ/7的辐角主值是复数-cosπ/7-isinπ/7的辐角主值是-cos(π/7)-isin(π/7)=cos(8π/7)+i

复数-cosπ/7-isinπ/7的辐角主值是
复数-cosπ/7-isinπ/7的辐角主值是

复数-cosπ/7-isinπ/7的辐角主值是
-cos(π/7)-isin(π/7)
=cos(8π/7)+isin(8π/7)
辐角主值是:8π/7