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makskot69
@makskot69
July 2022
1
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Среди указанных формул укажите неверную.
А) cos2x=sin^2 x- cos^2 x
B) sin^2x+cos^2x=1
C) sin 2x=2sin x cos x
D) Tg x ctg x=1
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lenatsareva
Неправильный С
потому что sin2x=2cosxsinx
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потому что sin2x=2cosxsinx