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LShL11D
@LShL11D
November 2021
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2cos^2х-cos 2х упростить
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Удачник66
Verified answer
2cos^2 x - cos 2x = 2cos^2 x - (cos^2 x - sin^2 x) = cos^2 x + sin^2 x = 1
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kazimierz2015
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Verified answer
2cos^2 x - cos 2x = 2cos^2 x - (cos^2 x - sin^2 x) = cos^2 x + sin^2 x = 1