Напишите сочинения на тему спортивные соревнования по и как читаются слова буквами

At school most of all, for some reason, I like physical education. Maybe because you do not have to strain and think, maybe because there you work physically, and not mentally.
And today the sun is shining in the street, the weather is wonderful and I'm happy to go to school. Today we have not just a school day. Today we have a holiday: at the school stadium will be held annual school competitions among classes.
This year we have prepared better than in the past, specially trained a lot. We are ready to run and jump, to perform all the relay races. Our team is more than ever set to win.
We watched the older guys and this year we will be able to show the master class. Our girls have come up with the same green costumes for us, we will carry out all the exercises in them.
Competitions will begin very soon, this is truly an exciting action, where you can observe the speed of runners, the flexibility of gymnasts and the talent of the player. And if you think about it, all these sportsmen are ordinary pupils of our school. Trains us all my favorite fizruk. In the past, he is also an athlete, only a professional. He also instilled in me a love of sport.
Sport always brings only joy and pleasure. You develop physically, you train your endurance and strength, you temper your health. Today we are doing a great job, it will be fun and interesting.

1. I was eatting lunch with my brother when I suddenly remembered my promise to phone my cousin . I stood up and went to the living room . I was dialing a number , when the doorbell rang . I opened the door and saw my cousin . 2 . While my cousin and I were having meals at McDonal's yesterday , we saw a friend of mine . I introduced him to my cousin . 3 . When I heard a knock at the door last night , I walked to the doorand opened it .

When I opened the door I saw my sister . I greeted  her and asked her to come in . 4 . My cousin and I were watching a film on TV last night , when my parents came in . They were watching the end of the film with us .

 

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