化简函数f(x)=2cosx.cos(x-π/6)-√3(sinx)^2+sinxcosx

来源:学生作业帮助网 编辑:六六作业网 时间:2024/05/14 22:47:43
化简函数f(x)=2cosx.cos(x-π/6)-√3(sinx)^2+sinxcosx化简函数f(x)=2cosx.cos(x-π/6)-√3(sinx)^2+sinxcosx化简函数f(x)=2

化简函数f(x)=2cosx.cos(x-π/6)-√3(sinx)^2+sinxcosx
化简函数f(x)=2cosx.cos(x-π/6)-√3(sinx)^2+sinxcosx

化简函数f(x)=2cosx.cos(x-π/6)-√3(sinx)^2+sinxcosx
f(x)=2cosx.cos(x-π/6)-√3(sinx)^2+sinxcosx
=2cosx*(cosx*cosπ/6+sinx*sinπ/6)-√3(sinx)^2+sinx*cosx
=2cosx*(√3/2*cosx+1/2*sinx)-√3(sinx)^2+sinx*cosx
=√3(cosx)^2+sinx*cosx-√3(sinx)^2+sinx*cosx
=√3((cosx)^2-(sinx)^2)+2sinx*cosx
=√3cos2x+sin2x
=2sin(2x+π/3)