2sin(πx/4-π/4)+6<2sin(πx/4-3π/4)+8

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2sin(πx/4-π/4)+6<2sin(πx/4-3π/4)+82sin(πx/4-π/4)+6<2sin(πx/4-3π/4)+82sin(πx/4-π/4)+6<2sin(πx/4-3π/4)

2sin(πx/4-π/4)+6<2sin(πx/4-3π/4)+8
2sin(πx/4-π/4)+6<2sin(πx/4-3π/4)+8

2sin(πx/4-π/4)+6<2sin(πx/4-3π/4)+8
2sin(πx/4-π/4)+6<2sin(πx/4-3π/4)+8的解集

sin(πx/4-π/4)-sin(πx/4-3π/4)<1
2cos(πx/4-π/2)cos(π/4)<1
cos(πx/4-π/2)<√2/2
2kπ-π/4<πx/4-π/2<2kπ+π/4
8k+1