This question is asking "Where does cosine equal

?"
Based on our unit circle values and the domain of the cos^{-1} function, we see that at 30 degrees, or

, cosine is equal to

.
Answer:
whats the choses ?????
Step-by-step explanation:
I think you have to divide
Heres an example x2- 16 when u solve or factor u should get the difference of two squares of (x+2) (x-2)