Ответ:
you know arctg(y)+arcctg(y)=π/2
arcctg2x+π/2=3π/4
arcctg2x=π/4
2x=tgπ/4
x=1/2
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Ответ:
you know arctg(y)+arcctg(y)=π/2
arcctg2x+π/2=3π/4
arcctg2x=π/4
2x=tgπ/4
x=1/2