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Marishka97
@Marishka97
July 2022
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докажите тождество:
1)(cos^3a-sin^3a)/(1+sinacosa)=cosa-sina
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dtnth
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Используя формулу разности кубов и основное тригонометрическое тождество
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Verified answer
Используя формулу разности кубов и основное тригонометрическое тождество