cos-π/3,cos-π/6

求√3cosπ/12-sinπ/
画出y2cos2xπ3在一个周期内的大致图像
31 2014-01-17 已知函数f(x=sin(x-π/6 cos(x-π/3.
已知cos(π6-a=根号33,求cos(5π6-a-sin(a-π6)的值
(0,π/3)xcos3xdx?请帮我看下解题过程对吗