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Question Number 69641 by Henri Boucatchou last updated on 26/Sep/19

Solve  arctg(1−x) + (1/(arcctg(1+x))) = (𝛑/4)

$$\boldsymbol{{Solve}}\:\:\boldsymbol{{arctg}}\left(\mathrm{1}−\boldsymbol{{x}}\right)\:+\:\frac{\mathrm{1}}{\boldsymbol{{arcctg}}\left(\mathrm{1}+\boldsymbol{{x}}\right)}\:=\:\frac{\boldsymbol{\pi}}{\mathrm{4}} \\ $$

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