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If Tan35^(0)=k , Then the value of (Tan1...

If `Tan35^(0)=k` , Then the value of `(Tan145^(0)-Tan125^(0))/(1+Tan145^(0)Tan125^(0))=` (A)` (2k)/(1-k^(2)),` (B) `(2k)/(1+k^(2))` (C) `(1-k^(2))/(2k),` (D) `(1-k^(2))/(1+k^(2))`

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