f（x）=psinwx*coswx-cos²wx=p/2*sin2wx-1/2(1+cos2wx)=p/2*sin2wx-1/2*cos2wx-1/2=1/2*√(p²+1)[p/√(p²+1)*sin2wx-1/√(p²+1)*cos2wx]-1/2=√(p²+1)/2sin(2wx-φ)-1/2∵f(x)最大值为1/2...