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IvanIvanovich
@IvanIvanovich
July 2022
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Найдите значение остальных тригонометрических функций угла a,если известно что:
cosa=-7/25; П<a<3П/2
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kmike21
Verified answer
Sina=-√(1-cos²a)=-√(1-49/625)=-√(576/625)=-24/25
tga=sina/cosa=(-24/25)/(-7/25)=24/7=3 3/7
ctga=1/tga=7/24
2 votes
Thanks 2
kmike21
в tg и ctg не те значения подставил, уже поправил, обнови страницу
IvanIvanovich
Спасибо
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Answers & Comments
Verified answer
Sina=-√(1-cos²a)=-√(1-49/625)=-√(576/625)=-24/25tga=sina/cosa=(-24/25)/(-7/25)=24/7=3 3/7
ctga=1/tga=7/24