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dashullya2001
@dashullya2001
July 2022
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ПОМОГИТЕ РЕШИТЬ ПРИМЕР УМОЛЯЮ!!!!!!!!!!!!
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Larryisreal19
1) По формуле: sina^2+cosa^2=1 находим sinasina^2=1-25/169sina^2=144/169(sina-12/13)*(sina+12/13)=0sina=12/13 sina=-12/13a -- угол 2 четверти, следовательно, sina=12/132) tga=(12/13):(-5/13)=(12/13)*(-13/5)=-12/5=-2.43)ctga=(-5/13):(12/13)=(-5/13)*(13/12)=-5/12
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dashullya2001
спасибо огромное!!!
Larryisreal19
Пожалуйста)
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