Упростите выражение:
а) sin(pi+a) + cos(3/2pi - a)
б) tg(pi/2 + a) - ctg(2pi - a)

Скільки всього цифр використино для запису чисел  для запису чисел?   Скільки різних цифр?30.66.43.64.60.34.

Отметьте предложения, в которых нарушен порядок слов, и перестройте их в соответствии с правилами:
Образец: Tom walks every morning to work. - Tom walks to work every morning.
1. Jim doesn't like very much baseball. 2. Ann drives every day her car to work. 3. When I heard the news, I immediately called Tom. 4. Maria speaks very well English. 5. After eating quickly my dinner, I went out. 6. You watch all the time television. 7. I think I'll go early to bed tonight. 8. You should go to the dentist every six months. 9. We went last night to the movies. 10. We go every summer to the sea in August.11. In the evening my parents go to the cinema with their friends.