докажите тождество cos альфа/1-sin альфа =1+sin альфа /cos альфа. Жду!

фонетический разбор слова : один

 Complete the gaps in the sentensec using passive voice

1. During the last lesson students ...(expose) to some authentic language. 2. At the moment the intensive language courses....(organise). 3. A new French texbook ...(write) recently. 4. Some people think that soon a simplified version of English ...(use) by many people. 5. They said that the book ...(translate) from German in 1989. 7. This article ...(discss) when he arrived at the meeting. 8. The essay should ...( finish) yesterday.