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saitur69
@saitur69
September 2021
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Здравствуйте . Пожалуйста докажите тождество! Заранее благодарен!
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sedinalana
Verified answer
4*(1+cos2x)²/4-2cos2a-1/2*(2cos²2a-1)=
=1+2cos2a+cos²2a-2cos2a-cos²2a+1/2=1+1/2=3/2
3/2=3/2
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NNNLLL54
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Answers & Comments
Verified answer
4*(1+cos2x)²/4-2cos2a-1/2*(2cos²2a-1)==1+2cos2a+cos²2a-2cos2a-cos²2a+1/2=1+1/2=3/2
3/2=3/2
Verified answer