Предмет: Геометрия, автор: dimon7777

В прямоугольном треугольнике ABC, угол A=90 градусов,AB=20см, высота AD=12см. Найти AC и cosC

Ответы

Автор ответа: acteka

0

АС=Х,тогда20х=12умножить на корень из(х^2+400),х=15,sinC=12/15=2/3,cosC=кореньиз5 делить на 3

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