cos2xcosxsinx3sin2x的知识精选

函数f(x)=cos2x+cos(x+)+sin(x+)+3sin2x的最小值是(   )A.0       ...
问题详情:函数f(x)=cos2x+cos(x+)+sin(x+)+3sin2x的最小值是(   )A.0            B.2            C.           D.3【回答】A知识点:三角恒等变换题型:选择题...
热门标签