已知sin(a-π/4)=3/5,π/4

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已知sin(a-π/4)=3/5,π/4已知sin(a-π/4)=3/5,π/4已知sin(a-π/4)=3/5,π/4π/4

已知sin(a-π/4)=3/5,π/4
已知sin(a-π/4)=3/5,π/4

已知sin(a-π/4)=3/5,π/4
π/4