求数学帝化简,急
问题描述:
求数学帝化简,急
化简(√3*sin4x)/cos2x-4sin^2x
求这函数定义域和最大值
答
原式=2√3sin2xcos2x/cos2x-4(1-cos2x)/2
=2√3sin2x+2cos2x-2
=4(sin2x*√3/2+cos2x*1/2)-2
=4(sin2xcosπ/6+cos2xsinπ/6)-2
=4sin(2x+π/6)-2