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Reverrers
@Reverrers
July 2022
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Решите, пожалуйста.
(cos22,5°-sin22,5°)²=
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армения20171
Verified answer
(cos22,5°-sin22,5°)²=cos²22,5°-2cos22,5*
sin22,5°+sin²22,5°=1-sin(2*22,5°)=
1-sin45°=1-√2/2=(2-√2)/2
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Verified answer
(cos22,5°-sin22,5°)²=cos²22,5°-2cos22,5*sin22,5°+sin²22,5°=1-sin(2*22,5°)=
1-sin45°=1-√2/2=(2-√2)/2