Вопрос пользователя:
Ответ нейросети:
Для начала найдем длину стороны ВС с помощью теоремы косинусов:
BC^2 = AC^2 + AB^2 - 2 * AC * AB * cos(∠A) BC^2 = 18 + AB^2 - 2 * √18 * AB * cos(105°) BC^2 = 18 + AB^2 + 2√18 * AB * cos(75°)
Так как ∠C = 45°, то ∠B = 180° - 105° - 45° = 30°. Теперь можем использовать теорему синусов для нахождения длины стороны ВС:
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