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sinx/cosy +cosy/sinx+cos x/siny+siny/cos x<6 and sin(x+y)=2/3 and 0<x<pi/2 and 0<y<pi/2
sinx/cosy +cosy/sinx+cos x/siny+siny/cos x<6 and sin(x+y)=2/3 and 0<x<pi/2 and 0<y<pi/2
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