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shkatena15
@shkatena15
July 2022
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В треугольнике АВС угол В равен 120 градусов , АВ = 3. ВС=5. Найдите сторону АС.
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dbrnjhbzo
AC²=BC²+AB²-2AB*BC*cos120
AC=25+9-2*3*5*(-0,5)=34+15=49
AC=7
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Answers & Comments
AC=25+9-2*3*5*(-0,5)=34+15=49
AC=7