Составь во и ответы, используя конструкцию there is / there are
и запиши их.
Образец:
Сucumbers -- yes --> Are there any cucumbers? -- Yes, there are some.
Apple -- no --> Is there an apple? -- No, there is not.
1)Chair--no
2) water--yes
3)flowers--no
4)cars--yes
5) rice--no

1. Paul asks Susan if Tony is talking to her brother.
2. Sue commented on her parents' vsit to Italy the previous summer.
3. I asked Pam if she would post the letter for me.
4. Adam said that Sam hadn't come back from England.
5. Dr Newman advised Mr Black to check has blood pressure as it was very high.
6. Gonald wanted to know if Tin had been at Patrick's the rpevious last Saturday.
7. Becky suggested having a party to celebrate Halloween with their friends.
8. Helen promised Mike that she won't forget to buy the food he wanted for that night's dinner.
9. Dave said that they must do their homework every day not to make their teachers angry.

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