Sinx-sin2x=cos2x !!!!!!!!!!!!!!!!!!!!!!!

sinx-sin2x=cos2x sinx - 2sinxcosx = 1 - 2[latex]sin^{2}x [/latex] 2[latex]sin^{2}x [/latex] - 2sinxcosx + sinx = 1 [latex](sinx-cosx)^{2} [/latex] = -sinx 1=sinx x=0