Cos(x-pi/6)=корень2/2
Срочно

треугольник ABC прямоугольный , BC - гипотенуза , AD - высота , угол В = 60*,DB = 2 см . Найдите длину отрезка DC.

надо найти пару слов с одинаковыми звуками: друг-гурт, сруб-брус, стиль-лист, гроздь-горсть, шов-вошь.

Помогите пожалуйста, передайте следущие предложения в косвенной речи.

1. Father said to Jane: "Show me your exercise-book." 2. "What are you doing here, boys?" said Kate. 3. "Don't make noise," said Tom's mother to him. 4. Helen said to Pete: "Did you play chess with your father yesterday?" 5. Kate said to her grandmother: "Help me to cook the soup, please." 6. Mike said to the teacher: "My sister knows two foreign languages." 7. "What have you prepared for today, children?" said the teacher. 8. Tom said to his sister: "I saw your friend at the library yes­terday." 9. The teacher said to the pupils: "Don't open your books." 10. Mother said to me: "You will go to the cinema tomorrow."

помагите пожалуйста решить уравнение по дискрименанту -х(в квадрате) -12х-32=0