y=cos(2x-30°)+sin(60°+2x)=cos(2x-90º+60º)+sin(2x+60º)=sin(2x+60º)+sin(2x+60º) 【cos(2x-90º+60º)=sin(2x+60º)]】=2sin(2x+π/3)由2x+π/3=kπ,得x=kπ/2-π/6,k∈Z...