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Mathematics, 27.08.2021 03:10 pineapplepizaaaaa
2(cosx)^2+2(cos2x)^2+2(cos3x)^2-3=c os4x(2sin2x-1)
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2(cosx)^2+2(cos2x)^2+2(cos3x)^2-3=c os4x(2sin2x-1)...
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