fx=2sin(wx-π/3)coswx+2cos(2wx+π/6)化简

f(x)=2(sinwxcosπ/3-coswxsinπ/3)coswx+2(cos2wxcosπ/6-sin2wxsinπ/6)
=2(1/2sinwx-√3/2coswx)coswx+2(√3/2cos2wx-1/2sin2wx)
=sinwxcoswx-√3cos^2wx+√3cos2wx-sin2wx
=-1/2sin2wx+√3cos2wx-√3/2(1+cos2wx)
=-(1/2sin2wx-√3/2cos2wx)-√3/2
=-sin(2wx-π/3)-√3/2
打这些打得我好痛苦,应该蛮详细了,