Which of the following are solutions to the following equation where 0≤θ<2π cos(2θ)=−√3/2

Question

Select all that apply:

1. 5π/12
2. 
   
3. 7π/12
4. 
   
5. 11π/12
6. 
   
7. 13π/12
8. 
   
9. 17π/12
10. 
    
11. 19π/12

Answer 1

If cos x = -√3 / 2, what is x equal to?

Then divide that value in half.