Упростить 1) sin квадрат альфа - cos квадрат альфа 2) sin куб альфа + cos куб альфа 3) sin в четвертой степени альфа - cos в чертвертой степени альфа

Раскройте скобки. корень из 2 умножить (7+корень из 2)

v=(u-V) Следует: 0=MV-m(u-V) Как выразить V (большое, а не маленькое)


Точнее я видел как выразить, но только конечный результат, а как он получен мне не ясно.

Ответ:  mu/m+M

Сравните время свободного падения тел на Земле и на Луне,если высота, с которой пада.т тела, одна и та же. Ускорение свободного падения на Луне 1.6 м/c2

Упр. 210. Раскройте скобки, употребляя глаголы в Present Perfect, Present Continuous, Present Simple или Past Simple.

1. Please give me a pencil, I (to lose) mine. 2. I (not to meet) Peter since Monday. 3. Nina just (to finish) work. 4. Where Sergei (to be)? — He (to go) home. He (to leave) the room a minute ago. 5. What you (to read) now? — I (to read) "Jane Eyre" by Charlotte Bronte. 6. They (to read) "Ivanhoe" by Walter Scott a month ago. What about you? You (to read) "Ivanhoe"? 7. My watch (to stop). There (to be) something wrong with it. 8. You (to see) Jack today? — Yes, I (to see) him at the institute. 9. You (to hear) the new symphony by M.? — Yes, I... . — When you (to hear) it? — I (to hear) it last Sunday. 10. You (to change) so much. Anything (to happen)? 11. What you (to do) here at such a late hour? You (to write) your composition? — No, I (to write) it already. I (to work) at my report. — And when you (to write) your composition? — I (to finish) it two days ago. 12. I say, Tom, let's have dinner. — No, thank you, I al-I ready (to have) dinner. 13. What the weather (to be) like? It still (to rain)? — No, it (to stop) raining.