解3sin(2x+π/3)-√3cos(2x+π/3)
=2√3（√3/2sin(2x+π/3)-1/2cos(2x+π/3))
=2√3（cosπ/6sin(2x+π/3)-sinπ/6cos(2x+π/3))
=2√3sin（2x+π/3-π/6）
=2√3sin（2x+π/6）
化简3sin(2x+π/3)-√3cos(2x+π/3)
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