sinx*cosx+cosx^2=1/2sin2x+1/2(cos2x+1)=1/2(sin2x+cos2x)+1/2=1/2(sin2x+cos(兀/2-(兀/2-2x))+1/2=1/2(sin2x+sin(兀/2-2x))+1/2=1/2*2sin(2x+兀/2-2x)/2cos(2x-兀/2+2x)/2+1/2=sin兀/4cos(2x-兀/4)+1/2=√2/2cos(2...