представить в виде произведения

[tex]\frac{1}{2} [/tex] - cos t 

Добрый вечер!

ПронИкать. Правильно ли написано это слово? Как проверить эту букву?

Заранее большое спасибо!

Назовите комплексные соединения:

Na3[Co(NO2)6]; [Cu(NH3)4](NO2)2; Fe3[Fe(CN)6)]2

Помогитеее:D

Hi Beth,
(1) __________ you have a good holiday? I phoned you several times this morning, but you
(2) __________ answer, so I think you were in bed. I’m sure the plane arrived late last night. I can’t wait to talk to you! What was the hotel like? Did you meet (3) __________ interesting people? How much did you spend?!
Last week here was quite boring really. I didn’t (3) __________ anything interesting. I worked at the farm shop for three mornings and then I spent all the money in one afternoon! I didn’t buy the new George Clooney DVD, but I borrowed it from Jason. You can watch it with me tomorrow. I didn’t go online because there were some problems with our computer. So I couldn’t send you an email, but I (5) __________ a couple of text messages. Did you get them? Also – I didn’t do any schoolwork! It’s the holidays!
Phone me soon and tell me what you did in Ireland!
Love,
Amanda

назваие знаминитого Рамана А.Дюма