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kira130316
@kira130316
May 2023
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Знайдіть значення виразу 1/(1-tg a) -1/(1+tg a) при a=п/8
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fenix6810
ответ 1
(1+tga-1+tga)/(1-tg^2a)=2tga/(1-tg^2a)=tg2a
tg2a=tg(2*П/8)=tg(П/4)=1
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kira130316
June 2023 | 0 Ответы
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(1+tga-1+tga)/(1-tg^2a)=2tga/(1-tg^2a)=tg2a
tg2a=tg(2*П/8)=tg(П/4)=1