发布网友 发布时间:2024-10-24 00:21
共1个回答
热心网友 时间:2024-11-10 05:09
(2)=cos(π+π/3)=-cosπ/3=-1/2
(4)=cos(π/6-4π)=cosπ/6=√3/2
(6)=cos(π-18π)=cosπ=-1
(8)=tan(-60°+28*360°)=tan(-60°)=-tan60°=-√3
热心网友 时间:2024-11-10 18:16
(2)=cos(π+π/3)=-cosπ/3=-1/2
(4)=cos(π/6-4π)=cosπ/6=√3/2
(6)=cos(π-18π)=cosπ=-1
(8)=tan(-60°+28*360°)=tan(-60°)=-tan60°=-√3