由半角与倍角的关系可将原式化简：√3sinxcosx=√3/2*（2sinxcosx）=√3/2sin2x2cos^2x=（2cos^2x-1）+1=cos2x+1sin^2x=-（1-2sin^2x）/2+1/2=-cos2x/2+1/2所以原式f(X)=√3/2sin2x+cos2x+1-（-cos2x/2+1/2）-1/2=√...