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amanda2014
@amanda2014
July 2022
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Найдите значение выражения -12tg20 *tg70+7
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nelle987
Verified answer
Tg(20deg) * tg(70deg) = tg(20deg) * tg(90deg - 20deg) = tg(20deg) * ctg(20deg) = 1
-12tg(20deg) tg(70deg) + 7 = -12 + 7 = -5
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Answers & Comments
Verified answer
Tg(20deg) * tg(70deg) = tg(20deg) * tg(90deg - 20deg) = tg(20deg) * ctg(20deg) = 1-12tg(20deg) tg(70deg) + 7 = -12 + 7 = -5