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МатематикаВопрос:
3) In the given triangle ABC, angle B is 60 degrees, side AB is 2.4, and the angle at C is a right angle. Find the length of side BC.
Ответ:
Решение:
- В прямоугольном треугольнике ABC, угол C = 90 градусов.
- Угол B = 60 градусов.
- AB - гипотенуза, AB = 2.4.
- BC - катет, прилежащий к углу B.
- Используем тригонометрическую функцию косинус: cos(B) = BC / AB.
- cos(60°) = BC / 2.4
- 1/2 = BC / 2.4
- BC = 2.4 / 2 = 1.2
Ответ: 1.2
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