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Mathematics, 24.07.2021 14:00 luisanavarrogarcia

Giải các phương trình sau: a) sin^4x + cos^4x = 1 + sin2x b) cos 4x + cos 2x = 2 cos^x

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Giải các phương trình sau: a) sin^4x + cos^4x = 1 + sin2x b) cos 4x + cos 2x = 2 cos^x...

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