![](https://iknow-base.cdn.bcebos.com/lxb/notice.png)
sin7兀/6*tan(-2兀/3)等于多少
1个回答
关注
![](https://wyw-base.cdn.bcebos.com/pc-content/follow.gif)
展开全部
sin7兀/6=sin(π/6+π)=
咨询记录 · 回答于2022-11-05
sin7兀/6*tan(-2兀/3)等于多少
sin7兀/6=sin(π/6+π)=
sin7兀/6=sin(π/6+π)=-sinπ/6
sin7兀/6=sin(π/6+π)=-sinπ/6=-1/2
tan(-2兀/3)=tan(π-2π/3)=tan(π/3)=根号3 tan(-π/3)=-tan(π/3)=-根号3
sin7兀/6*tan(-2兀/3)等于(-1/2)*(-根号3)=根号3/2