Рассмотрим сразу числитель: sin 10 cos 55 + sin 280 sin 55 = sin 10 cos 55 + sin (270 + 10) sin 55 = [формулы приведения] = sin 10 cos 55 + (-cos 10) sin 55 = [sin (a-b) = sin a cos b - sin b cos a] = sin (10 - 55) = sin (-45) = - sin 45 = -√2/2 Знаменатель: sin 10 cos 110 + sin 260 cos 200 = sin 10 cos (90 + 20) + sin (270 - 10) cos (180 +20) = sin 10 (-sin 20) + (-cos 10) (-cos 20) = cos 10 cos 20 - sin 20 sin 10 = [cos(a+b) = cos a cos b - sin a sin b] = cos (10+20) = cos 30 = √3/2 Все выражение: √6 * (-√2/2) / (√3/2) = -√6*√2*2 / (2√3) = -√2 * √2 = -2
sin 10 cos 55 + sin 280 sin 55 = sin 10 cos 55 + sin (270 + 10) sin 55 = [формулы приведения] = sin 10 cos 55 + (-cos 10) sin 55 = [sin (a-b) = sin a cos b - sin b cos a] = sin (10 - 55) = sin (-45) = - sin 45 = -√2/2
Знаменатель:
sin 10 cos 110 + sin 260 cos 200 = sin 10 cos (90 + 20) + sin (270 - 10) cos (180 +20) = sin 10 (-sin 20) + (-cos 10) (-cos 20) = cos 10 cos 20 - sin 20 sin 10 = [cos(a+b) = cos a cos b - sin a sin b] = cos (10+20) = cos 30 = √3/2
Все выражение:
√6 * (-√2/2) / (√3/2) = -√6*√2*2 / (2√3) = -√2 * √2 = -2


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Батыс Қазақстан облысы, Орал Қ.Ә., Орал қ.
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АҒЫЛШЫН ТІЛІ - 6 Ә
HEALTHY HABITS
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Healthy habits
Healthy habits

We like jogging in the park.
Jogging is running at a slow, steady pace.
Unhealthy habits

He spends too much time watching TV.

I sleep eight hours.

Sam sleeps only five hours.

I do fitness in the gym.

Sam plays video games too much.

I eat only healthy food.

Ted eats fast food.
Some tips for healthy habits.
1.Visit the dentist twice a year.
2.Brush your teeth twice a day.
3. Be active. Don’t be a couch potato.

A couch potato is a person who takes little or no exercise and watches a lot of television.
4.Spend a lot of time outdoors.
5.Don’t eat before going to bed.
6.Eat dairy products (milk, yogurt, butter, cheese, cream) every day.
How to write a good story? Sentence starters will help you write a story.
One day ………
Last week.., Yesterday ..…
On a……….day
Once upon a time..
sentence starters to begin introduction
I think……is…because……
There are many reasons why……
Firstly, Secondly, Thirdly……
In addition……
sentence starters to write the details
Now you know why………is…
As you can see……
Finally……………
In conclusion……….
sentence starters to conclude writing
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