sin派*x/6>1/2

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sin派*x/6>1/2sin派*x/6>1/2sin派*x/6>1/2sin(π*x/6)>1/22kπ+π/6<π*x/6<2kπ+5π/612k+1<x<12k+5

sin派*x/6>1/2
sin派*x/6>1/2

sin派*x/6>1/2
sin(π*x/6 )> 1/2
2kπ+π/6 < π*x/6 < 2kπ+5π/6
12k+1 < x < 12k+5