2sin(2x+pi/6)+1=корень3×sin2x+cosx

2sin(2x+pi/6)+1=корень3×sin2x+cosx
- Предмет:
  Алгебра
- Автор:
  snow whitesmhn
- 5 лет назад

Ответы 1

2Sin(2x + π/6) + 1 = √3Sin2x + Cosx
2(Sin2xCosπ/6 + Cos2xSinπ/6) + 1 = √3Sin2x + Cosx
2(Sin2x * √3/2 + Cos2x * 1/2) + 1 = √3Sin2x + Cosx
√3Sin2x + Cos2x + 1 = √3Sin2x + Cosx
Cos2x - Cosx + 1 = 0
2Cos²x - 1 - Cosx + 1 = 0
2Cos²x - Cosx = 0
Cosx(2Cosx - 1) = 0
1) Cosx = 0
x = π/2 + πn , n ∈ Z
2) 2Cosx - 1 = 0
2Cosx = 1
Cosx = 1/2
x= ± arcCos1/2 + 2πn , n ∈ Z
x = ± π/3 + 2πn , n ∈ Z
- Автор:
  sterling
- 5 лет назад
- 0
Добавить свой ответ

Еще вопросы

Companies have to conform ___________ the requirements.
Выберите один ответ.
into
with
at
for
on
of
to
in
Economics studies the ways in which people apply their knowledge _________ the gifts of nature _________ order to satisfy their needs.
Выберите один ответ.
for, on
to, in
with, of
to, at
Question 22
Баллов: 1
This form ___________ business enterprise is often referred ___________ as the one-person business.
Выберите один ответ.
for, into
in, at
of, to
on, with
Question 23
Баллов: 1
Working capital is __________ during the process of production.
Выберите один ответ.
consumer
consumed
consumption
consume
Question 24
Баллов: 1
Capital can be divided ___________ two categories.
Выберите один ответ.
on
to
with
at
into
for
of
Question 25
Баллов: 1
The Government influences spending ___________ particular goods and services.
Выберите один ответ.
in
with
into
at
to
on
for
of
Question 26
Баллов: 1
I’m afraid he’s away ________________ business today.
Выберите один ответ.
on
in
to
with
Question 27
Баллов: 1
Japan soon became a major ____________ in the electronics industry.
Выберите один ответ.
competition
competitive
compete
competitor
Question 28
Баллов: 1
The first Nobel prize in _________________ was awarded in 1969.
Выберите один ответ.
economical
economist
economy
economics
economize
economic
Question 29
Баллов: 1
On my salary we have to live as _________________ as possible.
Выберите один ответ.
economist
economically
economical
economize
economy
economics
Question 30
Баллов: 1
He spent all the money he had won _________ new clothes.
Выберите один ответ.
for
from
on
with
Question 31
Баллов: 1
These ________________ were not satisfied with the working conditions.
Выберите один ответ.
employees
self-employed
employer
employment
Question 32
Баллов: 1
We've been ________ business with them for over thirty years now.
Выберите один ответ.
taking
making
doing
Question 33
Баллов: 1
When you own a company, you are personally interested in running it ____________.
Выберите один ответ.
efficiency
efficiently
efficient
Question 34
Баллов: 1
People are entitled ___________ a ‘return’ or ‘reward’.
Выберите один ответ.
in
for
with
of
on
into
at
to
Question 35
Баллов: 1
To attract the necessary labour, local governments had to offer higher wages than private ____________
Выберите один ответ.
employers
unemployment
employed
self-employed
Question 36
Баллов: 1
The people in that town live very _________________ .
Выберите один ответ.
economy
economically
economists
economize
economical
economics
Question 37
Баллов: 1
I’ve applied ________________ the position of sales manager.
Выберите один ответ.
for
about
as
to
Question 38
Баллов: 1
What are the reasons ___________ the government involvement?
Выберите один ответ.
at
on
for
of
to
with
in
into
Question 39
Баллов: 1
The President’s ______________ reforms have put a lot of people out of work.
Выберите один ответ.
economists
economies
economics
economical
economic
economize
Question 40
Баллов: 1
Almost every society’s economy is based ___________ coins and paper notes.
Выберите один ответ.
of
into
in
at
for
to
on
with
- Предмет:
  Английский язык
- Автор:
  jesse
- 5 лет назад
- Ответов:
  
  1
- Смотреть
Помогите решить производную сложной функции: f(x)= 3lnx^2 + cos(sinx) - √x- 1
- Предмет:
  Алгебра
- Автор:
  tommycain
- 5 лет назад
- Ответов:
  
  1
- Смотреть
Гелий находится в закрытом сосуде под давлением 100 кПа и имеет плотность 0,16 кг/м³. Чему равна температура газа? (М = 4∙10 в минус 3 степени кг/моль). ОТВЕТ ДОЛЖЕН ПОЛУЧИТСЯ 307 К.
- Предмет:
  Физика
- Автор:
  chubbssalazar
- 5 лет назад
- Ответов:
  
  1
- Смотреть
Дон Кихот место и время действий
- Предмет:
  Литература
- Автор:
  baby98
- 5 лет назад
- Ответов:
  
  1
- Смотреть

2sin(2x+pi/6)+1=корень3×sin2x+cosx

Ответы 1

Топ пользователей