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2х п. Sin(2x-п/4)=-1/2. 2п-п/4. Sin 2(2x+п/4) 1/4. √2sin(2x-п/4) +1=0.
Sin(2x-п/4)=-1/2. 2п-п/4. Sin 2(2x+п/4) 1/4. √2sin(2x-п/4) +1=0.

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