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alenaandreeva19
@alenaandreeva19
August 2022
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в прямоугольном треугольнике AВС гипотенуза АВ=5 катет АС =4 найти sin А
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niparkonataliya
Verified answer
Sin∠A=
CB/AB
По теореме Пифагора в прямоугольном треугольнике ABC
AC²+CB²=AB²⇒CB²=AB²-AC²
CB²=25-16=9⇒CB=3
sin∠A=3/5
Ответ:3/5
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Answers & Comments
Verified answer
Sin∠A=CB/ABПо теореме Пифагора в прямоугольном треугольнике ABC
AC²+CB²=AB²⇒CB²=AB²-AC²
CB²=25-16=9⇒CB=3
sin∠A=3/5
Ответ:3/5