Предмет: Математика, автор: vblazhev

Решите уравнение: 2cos(3x)-корень из 3

Ответы

Автор ответа: qulparkk

0

Ответ:

2cos3x = √3

cos3x = √3 / 2

3x = arccos(√3 / 2) + 2πk, k є Z

3x = ±π/6 + 2πk, k є Z

x = ±π/18 + 2πk, k є Z

Пошаговое объяснение:

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: bella10

Напиши вопросы которые были заданы.

1.Noy much.
2.Sure.Here you are.
3.Not many.
4.Sure.Here you are.Its two pounds fifty pence.
5.No.you may not.its time to go to bed.
6.Not yet.Its still very hot.
7.Of course you may.What are ther names?

1 год назад

Предмет: Қазақ тiлi, автор: 50682

Мемлекет сөзіне фонетикалық талдау жасау

1 год назад

Предмет: Английский язык, автор: pechyandrej

7 Read the text and answer the questions.

1. Who are the Druids?

2. What do people in Robin’s time do in autumn and in winter?

3. What are autumn and winter in Scotland like?

4. What do people in Robin’s time do in spring and summer?

5. What are spring and summer in Scotland like?

6. What are the special days for the Druids?

7. Why are they special?

8. Do people remember these special days nowadays?

9. How do people celebrate them?

Misha: Do you have magical holidays, Robin? Can you tell me about them?
Robin: Well, where do I start, Misha? I come from Scotland and my great-grandparents were the Druids. The Druids are magical people. They can speak to the trees and to animals. They can fly and see into the future. They say that a year has two halves: a light half (spring and summer) and a dark half (autumn and winter).
The weather in Scotland is usually cool, but spring and summer are often nice. It is never hot, but it can be quite warm. It sometimes rains, but we also get some sun. The nights are short and the days are long. People work in the fields. Children lie in the sun and play in the woods.
But autumn and winter in Scotland are very cold. The weather is bad. In autumn it often rains and in winter it snows and rains,

1 год назад

Предмет: Биология, автор: vadik46

Напишите три заболевания мочевыделительной системы и их симптомы. Уже написал Уретрит и цестит.

8 лет назад

Предмет: Алгебра, автор: elaykina

решите систему уравнений х+у=3, х2+у^2=25+2 х у

8 лет назад