Y=sin(x+6/π)+sin(x-6/π)+cosx
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Y=sin(x+6/π)+sin(x-6/π)+cosxY=sin(x+6/π)+sin(x-6/π)+cosxY=sin(x+6/π)+sin(x-6/π)+cosxY=sin(x+6/π)+sin
Y=sin(x+6/π)+sin(x-6/π)+cosx
Y=sin(x+6/π)+sin(x-6/π)+cosx
Y=sin(x+6/π)+sin(x-6/π)+cosx
Y=sin(x+6/π)+sin(x-6/π)+cosx
=sinxcosπ/6+cosxsinπ/6+sinxcosπ/6-cosxsinπ/6+cosx
=√3sinx+cosx
=2(√3/2*sinx+1/2*cosx)
=2sin(x+π/6)
= =。 推公式？？ 慢慢算呗
判断单调性 y=sin(x-π/6) y=sin(-2x+π/3)
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