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Oksocoolamazing
@Oksocoolamazing
July 2022
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В треугольнике ABC угол С равен 90 градусов, sinA= 3/5, AC=3. Найдите ВС
ответ должен быть 2,25
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Artem112
Verified answer
SinA=BC/AB=3/5=3a/5a
AB^2=BC^2+AC^2
(5a)^2=(3a)^2+9
25a^2=9a^2+9
16a^2=9
a^2=9/16
a=3/4
3a=3*3/4=9/4=2.25
Ответ: 2,25
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Answers & Comments
Verified answer
SinA=BC/AB=3/5=3a/5aAB^2=BC^2+AC^2
(5a)^2=(3a)^2+9
25a^2=9a^2+9
16a^2=9
a^2=9/16
a=3/4
3a=3*3/4=9/4=2.25
Ответ: 2,25