利用定义求sin7π/3,cos7π/3,tan7π/3.

来源:学生作业学帮网 编辑:学帮网 时间:2024/05/14 11:50:13

利用定义求sin7π/3,cos7π/3,tan7π/3.

sin7π/3=sin(7π/3-2π)=sinπ/3=2分之根号3
cos7π/3=cos(7π/3-2π)=cosπ/3=2分之1
tan7π/3=tan(7π/3-2π)=tanπ/3=根号3.