Предмет: Геометрия, автор: Makusya220

Боковая сторона равнобедренного треугольника равна 8 см, а косинус угла при вершине равен 0,8. Найди площадь треугольника. с объяснением пожалуйста


siestarjoki: площадь по двум сторонам и углу между ними: S =1/2 ab sinC
siestarjoki: sinф =√(1-cosф^2)
siestarjoki: S=1/2 *8 *8 *0,6

Ответы

Автор ответа: manyny06
1

Ответ:

решение смотри на фотографии

Объяснение:

Приложения:
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