Вопрос школьника по предмету Математика
ПОМОГИТЕ ПОЖАЛУЙСТА, СРОЧНО, ПЛИИИЗ!!!
ДОКАЖИТЕ ТОЖДЕСТВО
1. sin2B — tgB = cos 2B tg B
Ответ учителя по предмету Математика
Из sin2B-tgB=cos2B tg B, следует что sin 2B противопопорционален cos 2B.
ПОМОГИТЕ ПОЖАЛУЙСТА, СРОЧНО, ПЛИИИЗ!!!
ДОКАЖИТЕ ТОЖДЕСТВО
1. sin2B — tgB = cos 2B tg B
Из sin2B-tgB=cos2B tg B, следует что sin 2B противопопорционален cos 2B.
Похожие вопросы от пользователей
1. Укажите верный вариант
A. The Chinese is making pots out white fine porcelain a thousand years.
Б. The Chinese have making pots of white fine porcelain from thousand years.
B. The Chinese have been making pots out of fine white porcelain for a thousand years.
Г. The Chinese have been made out pots from fine white porcelain thousand years.
2 Почту доставляют каждый день.
A. The mail delivers every day.
Б. The mail is delivered every day.
B. The mail is delivering every day.
Г. The mail has delivered every day.
3. Я переехал в Чикаго в 2016 году.
A. I came to Chicago in 2016.
Б. I came over Chicago in 2016.
B. 1 came over to Chicago in 2016.
Г. 1 came over to the Chicago in 2016.
4. От какого глагола нельзя образовать существительное с суффиксом — ment?
A. to detect
Б to commit
B. to improve
Г. to develop
5. Укажите верный вариант:
A. The best way most of us for remember things is join them to our mind with something what
we already know, or which we remember easily because we have picture in it of our mind.
Б. The best way for most of us to remember things is to join them in our mind with something
which we know already, or which we easily remember because we have a picture of it in our
mind.
B. The best way by most of us things to remembering are joining they for our mind of some
already we know, or what we easy remember because we have the picture on it by our mind.
Г. The best way of most to us remember things is a join of them to our mind with something
which we know already, or we easily to remember because we having a picture in it of our
mind.
6. Tell me — and I’ll forget, show me — and I’ll remember, let me do — and .
A. I don’t it!
Б. 1 will be the best!
B. it will be mine forever!
Г. you’ll never do it again!
7. Укажите верный перевод «беспроводная мышь»
A. mouse select button
Б. multi-cast mouse
B. mouse toolbox
Г. cordless mouse
8. Сделав работу,. Анна пошла домой.
А.- Haying done the work Ann went home.
Б. Having does the work Ann goes to the home.
B. Having doing the work Ann gone home.
Г. Have doing the work Ann go to home.
9. Укажите перевод выделенного слова: Читая английские книги, я всегда пользуюсь
словарем.
A. reading
having read
B. being read
Г. having been reading
10. Укажите верный вариант
A. They want not I to be lazy.
Б. They don’t want I lazy was.
B. They aren’t want me be lazy.
Г. They don’t want me to be lazy.
11. Укажите верный вариант
A. There was so many smoke as it got in the eyes.
Б. There wis so much smoke that it got into the eyes.
B. There was a much smoke so its got in for the eyes.
Г There was any smoke what it got of the eyes.
12. Укажите лишнее
A. Thomas Jefferson
Б. Alexander Graham Bell
B. John C. Portman
Г. Frank Lloyd Wright
13.Have you finished_______________your room?
A. clean
Б. to clean
B. cleaning
Г. cleaned
14. Какое слово из представленных анаграмм не является американским штатом?
A. NKECUYKT
Б. L AT AN AT
B. WELDAEAR
Г. NOINSETAM
15. Укажите лишнее
A. boring
Б. humdrum
B. dumb
Г . toothsome