cos乘以3分之16派怎么算啊

分类: 作业答案 • 2022-06-02 12:33:17

问题描述：

cos乘以3分之16派怎么算啊

答

cos(16π/3)
=cos(π/3+5π)
=cos(π/3+π)
=-cosπ/3
=-1/2