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Nse
@Nse
June 2022
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найди cos £, tg £. cfg£. а) sin£=3/5, 0<£<П/2
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prufik
Cos=√(1-sin²) = √(1-9/25) = 4/5
Tan=sin/cos=3/5:4/5=3/4
Ctan=1/tan=1:3/4=4/3=1 целая 1/3
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Tan=sin/cos=3/5:4/5=3/4
Ctan=1/tan=1:3/4=4/3=1 целая 1/3