已知tan(A+B)=2/5,tan(B-π/4)=1/4,求tan(A+π/4

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已知tan(A+B)=2/5,tan(B-π/4)=1/4,求tan(A+π/4
已知tan(A+B)=2/5,tan(B-π/4)=1/4,求tan(A+π/4)

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