O TASK 3 * Read the task and the notes. Then use the notes and words from exercise 1 to complete the discussion essay. = Are you for or against a complete ban on smoking? Explain your answer. smoking in public places = illegal let smokers decide themselves careful: cigarette ends = fire smoking is allowed outside bars and restaurants non-smokers breathe smoke very bad for smokers' health other habits bad for health

I am not very good at sports, but I like watching sport on TV.
My brother does not play the guitar, but he is very good at singing.
We are not very happy. Our team is not winning.
Ann and Robert do not like London and they are not planning to stay there.
Lucy is not very good at dancing. We do not enjoy her shows.
Marcus is not playing a computer game at the moment. He does not play computer games every night.
That song is not very good. I si not want to listen to it again.
Tony eats hamburgers. He eats a lot of meat.
Joanna does not have a swimming competition next week, so she is not practising very hard today.
I go to university by bus – I do not walk. So I have time to read magazines on the way. 

Choose the right answer.
There any cars in the car park.
b aren’t

Karol in a school. He is a teacher.
b works

she need a car? Yes, she does.
d Does

is Istanbul? In Turkey.
a Where

is he unhappy? I don’t know.
b Why

Sarah is the champion. She wins.
a always

Do you have umbrella?
b an

you help me please?
a Can

Germany is bigger than Italy.
a (no word – write Ø)

David happy? Yes, he is.
c Is

3.Read the advertisements and substitute the words in brackets with words from the lists. ( нужно заменить этими словами те слова, что в скобочках. То есть например в 1ом пропуске вместо clear, пишите cloudless и так далее)
peaceful-4
overpriced-2,
cloudless-1
modern-5
uncomfortable-3

Underline the correct option. Sometimes more than one option is possible.
I was having a shower when my friend called.
While Sally was walking to the station, she met Harry.
Tom went to bed and said, ‘Goodnight.’
Did you get angry when she finally told you?
We danced while the music was playing
I met David many years ago.

Сначала формулы . затем формулы двойного угла sin2α=2sinαcosα cos2α=cos²α-sin²α=cos²α-(1-cos²α)=2cos²α-1⇒  2cos²α=1+cos2α cos2α=cos²α-sin²α=1-sin²α-sin²α=1-2sin²α⇒  2sin²α=1-cos2α а) сos75°cos105°=cos(90°-15°)·cos(90°+15°)== sin15°(-sin15°)=-sin²15°=-(1-cos30°)/2=(cos30°-1)/2= ((√3/2)-1)/2=0,25√3-0,5б) sin75°sin15°=°sin(90°-15°)sin15°=cos15° sin15°=sin30°/2=1/4=0,25в) sin105°cos15°=sin(180°-75°)cos15°=sin75°cos15°=sin(90°-15°)cos15°=cos15°cos15°=(1+cos30°)/2=(1+(√3/2))/2=0,5 +0,25√3 2 способ формулы cosα·cosβ=0,5cos(α-β)+0,5cos(α+β) sinα·sinβ=0,5cos(α-β)-0,5cos(α+β) sinα·cosβ=0,5sin(α+β)+0,5sin(α-β) а) сos75°cos105°=0,5cos(75°-105°)+0,5cos(75°+105°)=0,5cos(-30°)+0,5 cos180°==0,5· √3/2+0,5·(-1)=0,25√3-0,5б) sin75°sin15°=0,5cos(75°-15°)-0,5cos(75°+15° )=0,5cos60°-0,5 cos90°=0,5·0,5=0,25в) sin105°cos15°=0,5sin(105°+15°)+0,5sin(105°-15°)= =0,5sin120°+0,5sin90°==0,5 sin(180°-60°)+0,5·1=0,5 sin 60°+0,5=0,25√3+0,5