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VARVARA572T
@VARVARA572T
August 2022
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2-sin^2a-cos^2a/2+sin^2+cos^2a
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rubilovalex
2-(sin^2a+cos^2a) / 2+(sin^2a+cos^2a)=2-1 / 2+1=1/3. Ответ: 1/3.
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rubilovalex
sin^2a+cos^2a=1-основное тригонометрическое тождество.
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