Question

2 cos square( x square + X /6) equal to 2^n + 2^-n​

Answer 1

Answer:

goood morning

Step-by-step explanation:

2 cos square( x square + X /6) equal to 2^n + 2^-n​

ANSWER

Given equation is cos2x+2cos  

2

x=2

⇒2cos  

2

x−1+2cos  

2

x=2

⇒4cos  

2

x=3

⇒cos  

2

x=  

4

3

​

 

⇒cosx=±  

2

3

​

 

​

 

Therefore, x=nπ±  

6

π

​

:n∈Z

Answer 2

Answer:

6+2+2

-n x X

- n = 10X

answer 10X

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