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sin(270-α)=-cosα
sinα+cosα=sinα+sin(90-α)=2·sin45·cos(α-45)
√2·cos(α-45)=5/7
cos(α-45)=0,5051
(α-45)=59,664°
α=104,664 β=270-α=165,336
sinα=0,967 tgα=-0,658
sinβ=0,253
sinα/sinβ-1/tgα=5,34