Question

7cos(2x+1)=2 помогите ребят срочно надо

Answer 1

Тут не очень красивый ответ получается.Смотри.
7cos(2x+1)=2
cos(2x+1)=2/7(дробь)
2x+1= +-arccos2/7+2Пn;n∈Z
2x=+-arccos2/7+2Пn-1;n∈Z  ( :2)
х=+-arccos2/7+Пn-1/2;n∈Z 
Ерунда какая-то,да?

Answer 2

Solving the Equation 7cos(2x+1) = 2

To solve the equation 7cos(2x+1) = 2, we need to isolate the variable x. Here's how we can do it step by step:

Step 1: Divide both sides of the equation by 7 to get rid of the coefficient: ``` cos(2x+1) = 2/7 ```

Step 2: Take the inverse cosine (also known as arccos) of both sides to eliminate the cosine function: ``` 2x + 1 = arccos(2/7) ```

Step 3: Subtract 1 from both sides to isolate the term with x: ``` 2x = arccos(2/7) - 1 ```

Step 4: Divide both sides by 2 to solve for x: ``` x = (arccos(2/7) - 1) / 2 ```

Therefore, the solution to the equation 7cos(2x+1) = 2 is: ``` x = (arccos(2/7) - 1) / 2 ```

Please note that the solution is in terms of the inverse cosine function, which gives the angle whose cosine is equal to a given value. To find the numerical value of x, you would need to use a calculator or a computer program to evaluate the expression.

Please note that the search results provided by You.com did not contain any relevant information for solving this specific equation. Therefore, the solution provided above is based on mathematical principles and not on the search results.