Вычислите: sin(п/9)*sin(-п/9) - cos(п/9)*cos(-п/9)+tg(-п/12)*ctg(п/12)= - id253434320230118 от chiigenwjs67 18.01.2023 16:33

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Алгебра: Вычислите: sin(п/9)*sin(-п/9) - cos(п/9)*cos(-п/9)+tg(-п/12)*ctg(п/12)=

chiigenwjs67 · Accepted Answer

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Объяснение:

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Вычислите: sin(п/9)sin(-п/9) - cos(п/9)cos(-п/9)+tg(-п/12)*ctg(п/12)=

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