化简sinx+sin(x+2π/3)+cos(x+5π/6）
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化简sinx+sin(x+2π/3)+cos(x+5π/6）化简sinx+sin(x+2π/3)+cos(x+5π/6）化简sinx+sin(x+2π/3)+cos(x+5π/6）=sinx+sin(
化简sinx+sin(x+2π/3)+cos(x+5π/6）
化简sinx+sin(x+2π/3)+cos(x+5π/6）
化简sinx+sin(x+2π/3)+cos(x+5π/6）
=sinx+sin(x+2π/3)+sin(x+4π/3)
=sinx+sin(x+2π/3)+sin(x+2π/3)cos(2π/3)+sin(2π/3)cos(x+2π/3)
=sinx+sin(x+2π/3)-(1/2)sin(x+2π/3)+(√3/2)cos(x+2π/3)
=sinx+(1/2)sin(x+2π/3)+(√3/2)cos(x+2π/3)
=sinx+sin(x+2π/3+π/3)
=sinx+sin(x+π)
=sinx-sinx
=0
f(x)=2sinx*sin(x+π/3) 化简
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