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If Sin^(-1)(2p)/(1+p^(2)) - Cos^(-1)((1-...

If `Sin^(-1)(2p)/(1+p^(2)) - Cos^(-1)((1-q^(2))/(1+q^(2))) = Tan^(-1) (2x)/(1-x^(2))`, then prove that `x = (p-q)/(1+pq)`

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