(2m-1)sinx+(m+1)cosx-3m=0√[(2m-1)²+(m+1)²]sin(x+α)=3m √(5m²-2m+2)sin(x+α)=3m 其中,sinα=(m+1)/√(5m²-2m+2),cosα=(2m-1)/√(5m²-2m+2)sin(x+α)=3m/√(5m²-2m+2)-1≤sin(x...