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dmitrija753
@dmitrija753
August 2022
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Помогите пожалуйста Народ!!!
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kirichekov
Verified answer
Cosα=-√6/4, π/2<α<π
найти: sinα, tgα, ctgα
по условию, π/2<α<π, =>sinα>0
1 votes
Thanks 1
dmitrija753
как получили 3/5?
kirichekov
правило деления дробей, свойство корня квадратного: (6^(1/2)/4):(10^(1/2)/4)=(6/10)^(1/2)=(3/5)^(1/2)
dmitrija753
спасибо)
kirichekov
я "потеряла" минус у косинуса. исправлю
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Answers & Comments
Verified answer
Cosα=-√6/4, π/2<α<πнайти: sinα, tgα, ctgα
по условию, π/2<α<π, =>sinα>0