1. I do not like vegetables so I never eat …….. . A water B carrots 2. Is there an apple? No, there ……………. . A isn t B are 3. There isn t ………………rice, but there are any some carrots. A some B any 4. There are ……..eggs in the fridge . A some B any 5. This isn t a ………….. of olive oil. A packet B+ bottle 6. Dad has got some garlic, but he has not got ……..onion . A some B any 7. Is there any water? Yes , ……………………………. . A there isn t B there is 8. How ………………. apples do you want ? A much B many 9. …………. is New Year in your city? A When B What 10. How ………………. water is on the glass ? A many B much

1.She s making lemon tea d)  because her daughter has a sore throat.
2.The children are decorating the room   f)because  they are going to have a  party      tonight 
3.He s talking photos of his classmates a)because he is going to create a school album 
4.I m doing my English homework  c)because there will be a test tomorrow
5.They re  dressing up in funny costumes e)because it's a holiday tradition.
6.We re arranging a  school party b)becase we are responsible for the social                                                              programm. 
        
         
                                                   
 

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