设0

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设0设0设0由sinx-根号3cosx>0=2(1/2sinx-根号3/2cosx>0=2sin(x-π/3)>0可知sin(x-π/3)>0即-π/2+2kπ

设0
设0

设0
由sinx-根号3cosx>0
=2(1/2sinx-根号3/2cosx>0
=2sin(x-π/3)>0
可知sin(x-π/3)>0
即-π/2+2kπ