怎样把sinxcosx/sin^2xcos^2x化简为tanx/1+tanx?

怎样把sinxcosx/sin^2xcos^2x化简为tanx/1+tanx? cos^2+2sinxcosx+sin^2x sin 2x为何等于2sinxcosx f(x)=sin^2x-2根号3sinxcosx+3cos^2x怎样化简? sin^2xtanx+cos^2x/tanx+2sinxcosx-(1+cosx/sinxcosx)化简 sin^2xtanx+(cos^2x/tanx)+2sinxcosx-1+cos/sinxcosx 2sin^2x-sinxcosx-cos^2=1 2sin^2-sinxcosx-cos^2=1 2根号3sinxcosx+2sin^2x的值域 f(x)=sin^2x+sinxcosx-1/2,化简 求y=sin^2x+2sinxcosx的周期 已知tanx 2 则sin^2x-sinxcosx y=sin^2x+2sinxcosx的值域 y=(cos^2x)/(sinxcosx-sin^2x),(0 y=sin^2x-sinxcosx+1/2的值域 化简(sin^2x+2sinxcosx)/1+tanx 求y=sin^2(x)-sinxcosx+2的值域 2sin²x+2sinxcosx怎么化简